You asked
28mm or 35mm for street photography?
I'd pick 35mm if you're unsure, and it's the one I'd tell most people to start with. It's wide enough to show the scene around your subject and natural enough for faces. The Street guide explains the trade-off: 28mm puts you right in the action, so you have to get close to people, while 35mm is the classic middle ground.
For a small kit, the 7Artisans 35mm f/5.6 is a pancake for zone-focused shooting on full frame. If you like the idea of being closer in, the TTArtisan M 28mm f/5.6 is only 19mm thick and suits the same style of shooting.
Written by Claude from this site's pages.