As others have said, transgenderism may be something you would benefit exploring.
As a lesbian though, I will add that I fantasized about straight sex during my teenage years and still do. There is so much more media for it. I have found only a small handful of lesbian books and films that I would say are worth seeing. If the writing just isn't that good, it isn't good. Lesbian porn isn't even arousing since it's 99.9% of the time designed for men.
It's a hot take, I know, and I have gotten flamed for it in lesbian spaces, but I can't stop the ick reaction I have when I get physically close to men. I tried. I have the receipts over many long years trying to be straight. When I fell in love with a woman, all I wanted to do was touch her. Still read straight erotica. Still get aroused thinking about hetero sex scenes (though not ones with me and a guy I know in them, ugh) Fantasy != reality.