I decided to go for a challenge and try a tetradic harmony.

hmm...

I wasn't loving how it turned out, so I tried again using the exact same palette. Now all of a sudden it's gone from like a fall day to a chilly evening... with the same palette.

 

Finally I wanted to see if an analogous palette would be easier. 

It both was and wasn't.  Some areas don't have as much contrast as I'd like. And I'm definitely nervous about pink and orange trees and grass. It seems so wrong to not color them green...

 

Procreate timelapse: