Get a 1.5 hair cut, get a soft, medium, and hard brush, a moisturizer, a random dollar store durag and/ or wave cap, and a shampoo and conditioner (if you don't already have one).
Depending on your texture of hair, moisturize, start with the medium brush, 100 strokes each direction, do the same thing with the soft brush, put the durag on. Do this twice a day minimum, wash every 3-5 days, get a cut in about 6-8 weeks, and if need be, a taper + lineup in the interim.
First cut, you'll have waves.
Look up how to get 360s on Youtube if you need more help.