Thank you two for the advice I think, even though sometimes I have artblocks which last over months, I will never stop drawing. I'm still young (18 yey, so much responsibilty), and it would be nice, if I could fill the rest of my life with more and more art drawn by myself (and inspiration from great artists all over the world). Every great artist starts at some point, and they all have something in common: they don't give up.
@malcom I actually had the thought of drawing the feet (personally I think toes are even simpler to draw than fingers), but since I drawed this image for about twelve hours straight I finally thought, that I should just clean up some parts xD But I think you're right. This is a great advice to sort of "finish" a work, so that everything has some details and not giving up only because you're impatient. Will defenetly use it for the next piece I'm working on - a nativ (american?) girl in a fighting pose (only announce it because so I have to really finish it insteadt of discaring what's already drawn because no one knows, right? )