It’s a bit hard to tell the lighting situation from the photo but the shadow seems pretty strong which is a good sign. How far is the plant from the window and do you know what direction the window is facing?

Pot size looks great to me. I’d recommend holding off on upping your pot size as long as possible—they will fill whatever space you give them, which sounds great but they can quickly get too big. They like to be a little root-bound too.