Hey there. It is not necessary to wear any hat or tam to bed. The sections want to be wild and move around while you sleep. This knots the hair more, the tossing around. I noticed you did T&R but have since just gradually started to leave them alone. What have you been doing since you made the sections?
All you need to do is keep your hair clean and separate any sections trying to join together,that's it, pretty easy. Those sections you made are not dreads but the blueprints to them. They will drastically change over the next year. They will loosen, zig & zag and loop and shrink. They will need to loosen in order to do this, so please do not re-twist any or you will go back to square one each time. You will be excited by the changes. Washing & letting the hair move is the quickest way for it to dread.
It good you can crochet yourself all different color tams, some days you'll want to wear one when you go out, on those very messy days that we all have sometimes.
Peace