[Making Finger- and Toenails]

Hello! I want to try my hand (no pun intended) at making both fingernails and toenails, for maitreya, slink and the omega applier.

I know how to make textures, but I am not sure where to even begin. Is there a template for finger/toe nails? Would I need to own the above mesh hands/feet?

Sorry if these questions are obvious, I am just lost right now and don't know where to begin. Thank you in advance!