Advice for buying a foldable bicycle

[pulchritude]

Hello!

I'm seriously considering buying a foldable bicycle for getting to and from work (8 km or so each way), and I was wondering if you guys have any recommendations for the type I should get? I'm not sure what else I should put here, since I've never bought a bike before. I do think that I would like a bike that can change gears and basically one I could also ride recreationally.

Any help would be appreciated, and thanks in advance!