Oh, cool! Thanks on your input! I remember once I've tried to start something similar and also found it tough and quit. But I guess this is because I had an idea that I have to do something which I am not doing and struggling out of this idea more :)
Then maybe for me personally I would take first half of the day for this task when I am more fresh and relaxed and do it like a gym or yoga practice :) just a daily routine in sketching/growing new skill...
Yeah, I'd like to get some work out or yoga in my daily routine soon too. Still busy editing weddings that I shot recently. But soon I'll go on a holiday and things will start to slow down I hope ;)