The technique is there but it isn't dynamic :C The bland background just isn't cutting it; I know a lot of about bland backgrounds cuz I do it all the time.
Also, really get them proportions down first before painting because the arms are kinda bonked up. In any case, another thing I noticed was that the earth almost looks like it's emitting some kind of light. Not sure if you were going for that, but if you were, you need to be more consistent with ambient lighting and how it affects her since she's in direct proximity with the earth. Also U COME FROM DM WHERE IS UR COMPOSITION DAWG???