yes of course! i left them blank so people can give them their own personality and make them their own so any winner can make them an oc! its their character after this!
and thanks ive been making skins for a few years now, started just making little pixel arts and then moved over. my older sister was a huge inspiration and actually got me into all of this, but practice is a huge part of it and i used to use the Skinseed editor on mobile but now I use mcskin 3D on the PC
ive seen skins anywhere from $5-$25 (even a really famous person doing $40) per skin, i think it's best that when starting off you start lower. then if you're in high demand move prices up. but also consider have much work you put into it, ex. like how many hours