If that is true maybe that means that it actually is finite and has a center. And the rotation and light speed put an upper bound on its size.

Actually no, that would only be true if the universe was two-dimensional. The universe essentially curves back on itself. Kurzgesagt explained the two options of finite and infinity universes and this timestamp explaines the curving back: https://youtu.be/isdLel273rQ?t=120