first you ve done a beautiful painting! You re very talented!
my colours are not bright enough, everything is almost the same coluors, and when I try to highlight trees for example, my highlights don't even show...
I think your base is too wet, your next layer wont stick, wait a little time (1 hour?) and it becomes dryer and you can add highlights
colours in front are the brightest and darkest, farest away they become lighter and cooler (just more blue in it), taking this into account, the 3 large green evergreen trees look to have the same distance.
if you ll make the foreground a tiny bit darker and brighter in colour, you ve solved your problem and you ll get more 3D
-the door must be a bit lighter
- dont let your lake end up in the corner, but about 1/3 of the canvas,