Hi There!
I think your curiosity is great, but want to give you some warnings. I have been a lesbian since I was 10....knew about it at least, just didn't know what to do about it till in my teens. Starting from where you are, in a marriage to a man, don't expect the lesbian community to embrace you with open arms. I'm not saying this to be mean to you, just to let you know the reality of it...and why. Mostly lesbians are suspicious of what they view as "hetero" women coming in and wanting to experiment with their sexuality. Its a pretty touchy topic. I have been personally touched by this when I was involved with a woman exiting her marriage (so she thought) to become a lesbian. I was caught in the middle with a broken heart while she was "finding" herself...and ultimately went back to her marriage. I was never #1 in her life, but yet she had a great deal of fun with me learning about her newfound sexuality. It hurt for months!
What I tell bi-curious women (folks like you who are still in hetero relationships and beginning to experiment with women) is to please fine OTHER bi-curious women that don't develop as much an attachment to them. They can have fun sex together and everyone comes out fine. Also, both understand the commitment to their lover's male partner. Often with "real" lesbians there are alot of hard feelings about the woman sleeping with her male partner. Am I making any sense here?
Once you decide to leave your hetero relationship (if you decide to) you will be in a better position to go into the lesbian community and seek a long-term partner. You will be viewed as more serious about your sexual intentions rather than just a thrill seeker.
Hope that helps. Whatever you do to follow your heart, remember that you are still accountable to the other people you touch with your behavior. "Free love" isn't exactly free...if you get what I maen.
Good Luck
Pitbow