Pre Braid Advice?

Hi! I just joined this sub because i am mixed, and i have textured hair that i love! my mom is white so she didn’t really know how to take care of my hair, so everything i know i have taught myself. i am very interested in getting braids, but i’ve never got it done before, and was wondering what i should know before getting them for the first time!! anything helps, i’ve been wanting braids for YEARS and want to hopefully finally get some soon!