Jumping into an i3 for the first time and not sure where to start. Any and all advice apreciated

I live in CA and have been looking to get a new car and the i3 just speaks to me. but I'm not sure what I should be looking for. I am aiming to spend 15-20k. I'm a dunce with cars, so any and all advice is appreciated:

Top priorities in approximate order: Value and longevity Reliability and ease of maintainence battery life and ease of charging Larger screen Android auto

Some questions top of mind:

Is REX worth it? I hear it conflicting views, some have said that it increases potential maintainence cost and I should just get a newer model with a bigger battery. and does it depend on what year?

What year is the best bang for my buck?

Are any of them android audio compatible?

With my above priorities is there any year that I should not go older than?