Here they post a lot courses @ethxsololearners U can find it there, I hope its helpful

U can use blender its free and open source software with tunes of tutorials in youtube

YouTube is the greatest resource since it's free, that's how I learned. Just search how to make a poster or how to edit a photo, the sooner you start the better.

@designkingworld it's new but there are good tutorials

Udemy