Visit local hair care stores. Purchase a solution for hair setting. (I use Taliah Waajid's Crinkles & Curls)
Purchase perm rods, lock loops,soft spikes, pipe cleaners if you don't have any. (Use what you feel comfortable with)
Take small sections of hair and lightly spray the locks with your purchased solution. If you don't have any that's okay just use plain water will still do the job.
Choose your desired size perm rods, depending on the size of the desired curls. For tighter curls, choose smaller rods. For larger curls, choose larger rods. ( For the most tightest curls use pipe cleaners)
Roll sectioned areas with perm rods. Secure the rods into place. When the solution is dry, unroll the perm rods, and enjoy your curly look.
Enjoy the freedom(✿◠‿◠)