I would advise to learn some music theory. The good news is that you don't have to remember most of it. LMMS knows a lot of scales, and chords, there is no reason to learn those scales from the top of your head. The scale and notes used, make a piece happy or sad. This person uses Fruity loops, but ...
.so Files are Linux files.
Vestige can't deal with those.
Carla however can, but you cant automate those yet.
With Carla I had Amsynth working in LMMS.