What should I do?

Tried setting it up once on an old pc to have it as a kinda streaming thingy behind the tv. Never finished the project. First I was overloaded with options. Which Linux version, picked Ubuntu because why not? Did the download and could not find a USB stick at home that’s bigger than 2gb. Tried installing on a hard drive in my pc didn’t work. Gave up after that.

Bought where on the internet? I think that context is quite relevant tbh.