What happens afterwards

Question

For anyone that can answer. What do you do once you finished a programming language from sololearn what’s the next step or what should you do after

Answer 1

What would I do?
1.) I'll practice codes in that language as well start learning second language too.
2.) Start making codes on coding challenges in Sololearn.
3.) If I have enough knowledge about that language, I will help other users to clear their doubts or bugs and errors.
4.) Sololearn provides basic course only, I will find other site or YouTube channel who teach me advanced stuff like GUI designing etc.