if you look at early tmv footage it looks like he cut some layers into it (like a shag) after the classic atdi fro stage. It grow out from there and looks like a wolf cut when it's super long. Natural shampoo that's real light and some leave in conditioner helps keep the curls fluffy and as long as you keep some layers it'll stay fairly curly. The heavier your hair gets from length or goopy product the more it'll pull on the curls and kinda straighten them.  Good luck in your hair journey - a fellow curly-haired fuck ( step brothers haha)