Hi borealis,
Thanks for your question, and I hope we can help you and your gf.
I think the most important thing is to continue to have open and honest communication with her, which it sounds like you have been so far. Be candid about why you like to do (or want to do) these particular acts, that it is a turn-on and expression of your love towards her.
My assumption is that if she was your first, you may also be her first? She may be uncomfortable talking about sex, if inexperienced or shy as you have said. I think you are on the right track with the conversation you have had, as long as you are sensitive to her feelings and honest about your own, I feel the two of you will be able to work it out!
I have not had personal experience with either of those websites, but I know friends who used mojoupgrade -and had a positive outcome from it- and either site could probably help you get this tricky conversation started. Talk to your GF first and see if it is something she is open to trying. Good luck hon