Go on with colours.
Don't focus on what you think you've failed at making in the picture, just focus on the parts you find interesting, even tiny, and try to reproduce them in your new drawings.
Rinse and repeat with each piece.
At the rythm you manage to produce drawings, I'm pretty sure that soon you'll gather a bunch of these tiny successful tips that build great coloured pictures once put together :)
you are so wonderful :D so full with positivity !
your comments are very lovely <3
thank you, @berien !!!