Acts 2:30-31 (AKJV/PCE)
(2:30) Therefore being a prophet, and knowing that God had sworn with an oath to him, that of the fruit of his loins, according to the flesh, he would raise up Christ to sit on his throne; (2:31) He seeing this before spake of the resurrection of Christ, that his soul was not left in hell, neither his flesh did see corruption.
You have a little problem called reading YOUR ideas INTO the scripture.
Peter is speaking about what God said that He WILL do and NOT what He has ALREADY done.
HIS throne there refers to David's throne in Jerusalem.
Luke 1:31-33 (AKJV/PCE)
(1:31) And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name JESUS. (1:32) He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David: (1:33) And he shall reign over the house of Jacob for ever; and of his kingdom there shall be no end.
Isa 9:7 (AKJV/PCE)
(9:7) Of the increase of [his] government and peace [there shall be] no end, upon the throne of David, and upon his kingdom, to order it, and to establish it with judgment and with justice from henceforth even for ever. The zeal of the LORD of hosts will perform this.
Keep up the bad work there DB.