to answer this question, you should try a lot of crypto stuff, and you will find some problems to solve.
you will find common problems and segmented problems. You can start the project from that, I think.
it sounds simple but complicated to be realized.
however, you have a plus point already with your age. You are young and still have a lot of time to learn.
for now, you can just learn blockchain and crypto, you will find people with the same interest that you can collaborate with.
I suggest you start making content. the world needs educative content about blockchain and crypto in a simple and short way.
I believe you will grow from that.
First of all, thanks for your reply! I'm really happy to be on this forum : )
I think I will start with something like building a website about blokchain and bitcoin, just for myself to learn from and hopefully (you never know) it will be a helpfull site for other people.
When I start with it I'm sure I will be posting something about it here again, to get some feedback and stuff.