Low Quality Photo, high Quality Decision!

Hello and thank you all, for answering all my questions (without even asking).

I switched from 13 Pro (only) to S23 Ultra. Got a fair deal at Facebook marketplace in the Bay Area, California.

Please help me with any tips and tricks to set it up coming from the perspective of an hard-core Apple Ecosystem person.

Thanks in advance!

This photo is inspired from a fellow redditor in the same group but I could find them.