New to eBikes - where to start?

Hey everyone!

I'm totally new to the eBike world and trying to figure out where to even begin. I'm really interested in a folding eBike because I live in a small apartment and need something I can easily store and potentially take on public transport for my 5-mile commute. Any recommendations for reliable brands or key features I should be looking for in a folding model, especially for city riding with a few hills? Thanks in advance for any advice!