Make the values work and you're home free.
Are you painting over a photo? Or are you eyeballing it? Reason I'm asking is because the values in the photo would give you a pretty good idea of what you can use as a starting point.
Of course photos can frequently be improved. But it's a start. Often times blocking in the color/values works as a point at which to aim and finesse later by pulling up the lights or whatever. . . if it's not working.
Good start. Green is an interesting choice.
"Not a bit is wasted and the best is yet to come. . ." -- remembered from a dream