@malcom thanks, man. I am not sure about rim light yet but I am trying to blend her in with the background bit by bit.
However, today's evening i spent on figuring out the background a bit more and changing the scale of a character. I hope background looks better now and that character doesn't seem out of place anymore.
Since i didn't plan this piece thoroughly I screwed up my light again, oh well <_>
I tried to push certain parts a bit darker. I think the hair could use a bit more highlight, however, I know that blond hair doesn't really reflect too much light because it is usually dry and doesn't have much colour molecules in it but either way i think it could use a bit of a shine.