As for Photoshop I started with PS version 1 as a toy. I picked things up bit by bit. So by the time I did an actual graphics course I was getting exemptions & helping more than learning so to speak.

Each Adobe program has its own tutorials & have since version 1 (though it was a bit basic then.) Take each one thru one by one & you'll get there.

Adobe did have some online tutorials. You needed to register but it was a while ago. You didn't necessarily need to own their products just register at their site. It might still be the same.