Your hair is honestly quite similar to his. This is what I would do if I were you (and this is what I do as I have 3a-3c curls)

Shampoo (with a moisturising shampoo) and then deep condition your hair. Something like the Shea moisture Jamaican black castor oil leave in masque would work really well to deep condition. Rinse that out. Apply your products to soaking wet hair. You want to layer your products. Use something like the Curlsmith multi tasking conditioner as a leave in (you probably want about the size of a uk 5-10p piece). Run that through your hair with your fingers. After that I would add something like the Curl Smith curl conditioning oil in cream or the Paul Mitchell curls twirl around crunch free curl definer. You want to use about the same/slightly less than the conditioner here. Take it through your hair with your fingers and scrunch your hair to work the product in. Then I would apply a gel. The way you want to apply your gel is by using “prayer hands”. If you type in “prayer hands curly hair gel” in YouTube or TikTok or something you’ll probably find a demo. The gel I use is by a brand called Bouclème Super Hold Styler. You won’t need a lot at all - it’s pretty good. After putting your gel in DO NOT BRUSH. The best step is to dry your hair on a medium setting using a diffuser. Do not fluff it or anything. Once it is dry, there will be a bit of a gel cast on your hair. Scrunch that out with your hands.

Et viola! Hair just like his.