I started off throwing mainly forehand too. Some people will tell you that's a lot more difficult than throwing backhand.
If you keep playing you're going to learn backhand, one way or another. As you learn the various idiosyncracies of the different discs (weights, ratings, overstable vs. understable, etc.), you're going to figure out which discs do what. There's all kinds of "rules of the road" that come in "the manual" of how to huck a disc, but in the final analysis the only thing that matters is how you feel about how you throw your discs. Regardless of the "rules" or what you hear here from the wise old sages that've been doing this for a while, whatever works for you is the right way.
For now your best bet is doing and throwing whatever you feel comfortable with. Once you have a basic idea of your game, start incorporating something outside of your comfort zone. In this case, your backhand. Once you get comfortable with that with a few key discs -- I'd recommend a Mamba for drives, DX Roc for upshots and/or putts, and an Aviar for your putts -- you'll get in the zone and start seeing results.
Regardless of how or what your throw though, don't place too much value on the initial results. The point of disc golf is FUN. Have fun with the learning process. Once you realize you're not Paul McBeth right out of the box the more fund you're gonna have. And like The Man said, "Most fun....wins!"
Best of luck, brother!