If one reads the Rambam and the Shulchan Aruch carefully, you will see that the statement that one should not teach his daughters Torah was made based on a majority of women. It is clear that for a minority of women learning Gemara would be a wonderful thing.
The recommendation of the Gemara not to teach one’s daughter Gemara was based on the majority of women at that time.
If a girl and certainly a woman wants to learn, wants to know, wants to grow, then absolutely she should learn. And because it is almost impossible to learn Gemara properly without a rebbi, people should teach her.
BYM, I am certain that there are Orthodox programs (unfortunately none within the Yeshivish world) for adult women who want to learn. For many it takes a long time to appreciate Gemara and even longer to really enjoy it, but it is worth it in the long run. I wish you hatzlacha in this endeavor.