I am having marketing experience but never as affiliate, I had always market (successfully) my own product.
I had decided to get into affiliate marketing, but I had got rejected by most of the affiliate networks mentioned here as good for newbies.
Do you know networks that are open for newbies with marketing experience?
Try PeerFly, they're very newbie friendly.
Did you apply with us? We are newbie friendly. Feel free to apply!