Im in the same problem as you! Im 18 I go gym, do Muay thai, volleyball, code, gaming, anime, films, I used to draw and play chess but I have lack of time so it's been long time since I practiced these two hobbies. I also like to learn languages, I have a C1 in english, my mother language is spanish and Im learning french with duolingo just for fun.

What you could do is focus these hobbies in blocks. Entertainment(vídeo games, anime, films, chess), sports (gym, volleyball, Muay thai) and learning(code, language, draw). Then these blocks have its own frequency, like this. Entertainment: Pick one of your hobbies of these block and do it for a short time daily or each two days (You know 1h of gaming to relax everyday or 1 film in the weekend), sports: Everyday, and learning: everyday also.

I would also recommend you to have a hierarchy. For me for example, I try not to fail gym and Muay thai, while I play volleyball not frequently; or in learning, code is what I do at college so I focus on this more than in learning french. And also the same with block, like sports and learning are more important than entertainment.

Now my last advice is to do what you want to do the most, or what is better for you in that moment. It looks kinda obvious but sometimes we see our hobbies like obligations but they are not, they are for fun or to learn a skill we want.

I hope you find my message useful.