Suggestions

this sounds like such a n00b but i've finally understood c and now i don't know what to do, to clarify i work with other things and only program as a hobby so it's not like my life depends on it but as a hobby right now it's kinda dead

so i ask you to give suggestions to someone who wants to get more experience in c and has recently learned to understand the language

Make a program to reach out over the internets and stab someone in the face.

In reality, you could google for "programming challenges". Or, learn how socket programming works - I've met various people who've found writing their own network chat programs extremely useful in their development.