I should not presume to teach you anything new about Catholicism! I was only in public school for my K-12 education.
I will try to explain my earlier post, but it is likely that you will be able to correct me, if need be.
God, having created time, exists outside (or independently) of time. God does not have a past, present, and future, in the way that your or I do. He is the Alpha and Omega, the eternal I Am (note the present tense). He is, literally, ever-present (is, was, will be - all at once).
From God's extra-temporal perspective, the Creation is now. The Crucifixion is now. Men are making free choices now. The Endtimes are now.
Remember, time is inextricable from space - Einstein proved that. Meaning prior (I use the term loosely) to space (the physical universe), there was no time. And whatever brought about time and space exists outside of them. This thing - this non-temporal (eternal), non-spatial, logically necessary, uncaused cause - I call God.
What do you call it?
I don't call it anything, other than made up.
But the underlying sciency question then is, based on the evidence we have, the universe is 13+ billions of years old, the earth about 4. Life has been around on the earth for 3 billion + years. Humans evolved. Every living thing has evolved from when life started. did the Catholic god just start everything or has he directed things from time to time?? And if directed, when and how? Did he move the continents around? Did he push the asteroid that hit the earth and caused dino extinction? When did he reach down and touch the original Adam and Eve out there in Africa?
And perhaps the real underlying theological question, if the Catholic god is present all the time, all at once, thereby knowing all, how does he even care for his creation if he allowed it to get screwed up? Allowed disease? Or is it just a game because we are as ants to him? but that cannot be the case if he sent his son to be tortured and killed for us (which raises all sorts of other interesting questions as to your deity's motivation and needs)