its not ur brain, it actually has to do with muscle memory thats why I keep telling you A.A practice makes perfect (and muscle memory). trust me I used to be like that when I was younger. just keep trying and learning and you'll get there. it took me 9 years to finally perfect my art. (into semi-realism) but that dosent mean it will take YOU that long. who knows maybe you'll be better then all of us in just a year or even 4 months. everyone's different :) but even then your art right now is skill but its up to you