welcome yes crochet causs extreme permenant harm but one use wont kill them
Welcome. It's great you stopped palm rolling. If you do it enough to see any progress at all, it will severely destroy your locks.
And even worse, is crocheting. This is in response to your post. Crocheting is the second worst thing you can do to locks, after felting. All a crochet needle does is shreds your hair into smaller and smaller pieces. It doesn't help to make locks any more mature. It does help weaken them, though. Because with ever rip of a hair, it becomes weaker when it's knotted back to another hair. This method also makes your locks stiff and hard. The most mature/healthy locks should be soft and spongy
welcome acrtualy u can dread naturaly in any job
There's no reason to wait any period of time.
And nope, that's all you have to do. Wash 2-3 times a week and separate them as needed. You probably won't have to start doing that until you are a few weeks in, though. Nothing is needed to prep. Unless you used any gels or products. Then you need a good clarifying shampoo to get it out. 1 wash should do, 2 to be safer
Welcome. Be aware, that no matter how you start, i will take about a year for them to mature and not look kind of goofy. TnR and back combing don't create locks right away. They are only used to create a vaugue blueprint of where your locks will form. When you wash, they fall apart, leave them. Trying to TnR them again, will only start your process over, and will prolong your progress