If you are an artist, this will help you.
This is a tutorial on how to change what people see when you publish your project or remix your project.
When you are titling your project, edit the picture you see above your title. Try toying with it if it's your first time, just to get used to it.
It's actually quite fun toying with it!
Move the picture around. Zoom in and out. Play with it until it's how you want it to be.