There are no hard and fast rules for street photography, but this video just covers some of my thoughts on the subject, as well as 10 tips that hopefully could give you a place to start in developing your own process for street photography.
I referenced Ted Forbes YouTube channel, The Art of Photography. This is a great channel for learning about some of the more significant photographers of the 20th century that really helped get street photography started.
Here’s a link to a playlist on Ted’s channel covering these photographers:
https://www.youtube.com/watch?v=QuHGXpg-DB0&list=PLGEE7pGLuppQ8CH4cCcMZ3x5uNeFfdj8b