Young padawan ...
Okay, enough of that nerdy star wars.
Spare time ? Photoshop is not something you learn over a cup of tea
Anyways, I'm on the other side of the world so you'd probally be sleeping whem I'm awake visa versa.
I'd be glad to help you, but I think using this forum is the best way. Response may not be that fast always, but you'd be sure to get some great responses from a lot of people.
Also, I think you can find perfectly good tutorials, which will for starters teach you as well as any here can, also the "basics", if basics even exsist.
Of course theres composition and color management, but I wouldn't see that as an essentiel part to begin with.
If someone can find the time to help you, that's great!
Don't get me wrong ..