Completely up to you:

• writing; long or short stories (Stephen King's On Writing if you wanted a starting point), maybe set up an account on Medium (for example) and start posting? Maybe link it to your own patreon page when you feel comfortable?
• drawing; from short form comics to graphic novels (lots of youtube channels but a jump off point for structured lessons could be drawabox.com)
• music (again multiple youtube series and music tab sites, may however cost more buying an instrument and even more if you wanted to set up some sort of production suite - computer/software/audio equipment)
• video; wouldn't know where to start here for actually learning the skillset but the outlay for equipment could be potentially expensive though a smartphone with a camera could be sufficient to begin with (if you want inspiration look up a youtube series on video essays called Every Frame a Painting). If you develop drawing as a skillset you may want to veer into animation instead.
• video games; not sure where to start - again searching youtube though I found this for inspiration: https://www.freecodecamp.org/news/how-to-make-a-video-game-create-your-own-game-from-scratch-tutorial/