Wait... You do ALL the work on a trackpad?!!
If that's the case it's very impressing!
I would recommend doing a paper sketch first. Jazza has a great tutorial on how to digitalize here: https://www.youtube.com/watch?v=Z0n2FNK8sDI&index=2&list=PLNaAcA0yN3KZ_zsdf68T0gBMJp_KYDPli
I know not everyone has access to a scanner, but the change would be great to decrease the strain in your hand.
Also I would change the pose a little to give emphasis to the weight of the club since right now it doesn't look heavy for how big it is. And move her left hand a little so it doesn't blend with the hair (or change the color of th gloves)