Anarchy rules - break the rules lol...
Seriously though - This is a great shot, I tend not to follow rules to the letter, for me if a shot looks good on screen then I've achieved what I was looking for. Stunning sky in this shot, great reflections on the water and a nice bit of foreground interest, the mountains are a little dark and I would try and lighten them up a tad.
If you had the opportunity to shoot this again, I would possibly look for some clean water and use the reflection as foreground interest.
Looking at this shot and you being new to all this I don't think it will be long before you get some stunning shots.