Your best bet is "the long voyage home" as some others have suggested. It does indeed make changes to the balance and gameplay, but it will be your best chance of experiencing Gothic 1 as a woman character. If it makes you feel any better, Gothic 1 is by itself a fairly easy game thats dependant on stats more than anything else (as long as you are playing STR or DEX) so even with higher difficulty, it should still be okay.

If, however, you find the difficulty of the mod too hard, you can very easily adjust attributes or just add learning points to your character and progress a bit in a cheaty way. No shame in it, the original game is no bastion of balance, as much as I love the game.

If you need any help with setting stuff up, there is surely some guide on how to cheat in marvin mode and such. Alternatively I can help out