You might want to clean up the lineart so its not as sketchy and her right shoulder looks odd to me. (Its her right shoulder, so your left.) Please finish so I can see the final product!
Sadly, I don't have time to finish it today. u_u -Sighs- Well anyways, to answer how I got the watercolor feel..Um, ironically, I used the air brush XD And I took the advice to make it cleaner..It'll look better when done n_n;
drawn in 11 min
drawn in 15 min
drawn in 8 min