I am using DA for making my art, and i am doing a Red/strawberry roan horse. I need to cover up some white on the horse i am using buuut i do not know how to roan it to blend in..

And my other question, is Gimp free? Like i know its free but do you have to buy brushes.. etc. and i do not know if there would be any way to like transfer what you made to Gimp and start working on it...

Thanks so much for anyone who helps, i will be grateful.