Where to continue?

So i've recently started my break from school and now have a load of free time I don't know what to do with. I usually rely on my classes to give me loads of projects to do and now I feel like I'm just wasting my time sitting on my ass.

How do I know what to do or practice? What basics should I learn or brush up on? I like drawing, designing, photography, editing, and writing, but I rely on my professors to give me projects to do because I feel like my creativity is all over the place without them.

TLDR: My mind is scrambled with creative ideas. How can I turn them into something useful to grow?