There is no regardless.
of what that means (and there is no way to make it say what you want to...but regardless) Paul goes on to say that it was the Grace of God that was there first and it was the Grace of God that worked in and through him to accomplish God's will. Not his own obedience.
God’s grace is to those who obey His Son. You will never ever get around that, ever.
You should stop there before going on. Note the cause here - God. Not Paul. Not his goodness or righteousness or ability or even inclination - God. Period. That right there is the ground. That's the point - whatever happened after is a product of this and this alone - not of Paul. Paul cannot, then boast in his works (therefore, his righteousness). It is all of (from) God.
Paul did boast. Believe the truth.
God wants us to obey Him, and then we are blessed, His family, His friends.
Not before and not any other way.
John 5:14 You are my friends if you do what I command.
Matthew 12:50 For whoever does the will of My Father in heaven is My brother and sister and mother."
Luke 11:28 He replied, "Blessed rather are those who hear the word of God and obey it."
You strain at a gnat but overlook the phenomenal work that took place in Paul for him to believe God.
Being saved is no gnat. How to be saved is no gnat.
So, again...blessed is the man to whom God will impute righteousness without works.
The 'no works' is CIRCUMCISION.
By necessity, such a command is of a different nature altogether...
What shall we say then? Is the law sin? God forbid. Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet.
But sin, taking occasion by the commandment, wrought in me all manner of concupiscence. For without the law sin was dead.
For I was alive without the law once: but when the commandment came, sin revived, and I died.
Paul is explaining how the cut off Jews are still able to be saved.
And the commandment, which was ordained to life, I found to be unto death.
For sin, taking occasion by the commandment, deceived me, and by it slew me.
Wherefore the law is holy, and the commandment holy, and just, and good.
Romans 7:7-12
What is it then?
The Jews who did not have faith were CUT OFF.
The law did not require faith.
Galatians 3:12 The law is not based on faith; on the contrary, it says, "The person who does these things will live by them."
I find then a law, that, when I would do good, evil is present with me.
For I delight in the law of God after the inward man:
But I see another law in my members, warring against the law of my mind, and bringing me into captivity to the law of sin which is in my members.
Romans 7:21-23
So it can't be in me to obey properly :
You are badly mistaken not understanding the scriptures.
One scripture can prove you wrong, here are more than one showing people could and did obey properly:
Genesis 32:28 Then the man said, "Your name will no longer be Jacob, but Israel, because you have struggled with God and with humans and have overcome."
Luke 1:6
Both of them were righteous in the sight of God, observing all the Lord's commands and decrees blamelessly.
Genesis 6:8 But Noah found favor in the eyes of the LORD.
Genesis 7:1 The LORD then said to Noah, "Go into the ark, you and your whole family, because I have found you righteous in this generation.
Luke 2:25 Now there was a man in Jerusalem called Simeon, who was righteous and devout. He was waiting for the consolation of Israel, and the Holy Spirit was on him.
John 1:47 When Jesus saw Nathanael approaching, he said of him, "Here truly is an Israelite in whom there is no deceit."
Job 1:1, 8 There was a man in the land of Uz, whose name was Job; and that man was perfect and upright, and one that feared God...
1 Kings 9:4 And if you will walk before me, as David your father walked, in integrity of heart, and in uprightness...
1 Kings 15:5 For David had done what was right in the eyes of the LORD and had not failed to keep any of the LORD's commands all the days of his life--except in the case of Uriah the Hittite.
Genesis 17:1 When Abram was ninety-nine years old, the LORD appeared to him and said, "I am God Almighty; walk before me faithfully and be blameless.
Genesis 26:4-5 I will make your descendants as numerous as the stars in the sky and will give them all these lands, and through your offspring all nations on earth will be blessed, because Abraham obeyed me and kept my requirements, my commands, my decrees and my laws."
Luke 1:30 But the angel said to her, "Do not be afraid, Mary; you have found favor with God.
Acts 22:12 "A man named Ananias came to see me. He was a devout observer of the law and highly respected by all the Jews living there.
Hebrews 11:5 By faith Enoch was taken from this life, so that he did not experience death: "He could not be found, because God had taken him away." For before he was taken, he was commended as one who pleased God.
Genesis 5:24 Enoch walked faithfully with God; then he was no more, because God took him away.
Luke 2:37 and then was a widow until she was eighty-four. She never left the temple but worshiped night and day, fasting and praying.
Acts 10:22 The men replied, "We have come from Cornelius the centurion. He is a righteous and God-fearing man, who is respected by all the Jewish people.
For I know that in me (that is, in my flesh,) dwelleth no good thing: for to will is present with me; but how to perform that which is good I find not.
Romans 7:18
So the law is on our hearts but the righteousness is imputed.
What you have shown is your confusion and not God’s Truth. Paul was explaining who it was for those UNDER the law WITHOUT faith.
Remember, God cut off faithless Jews.