So I went ahead and downloaded the mod linked in your post.
It doesn't crash my game, which is a good thing in and of itself, but I didn't see where I could Export/Import my character nor did I see where to reset my Skills Tree/ Attribute Point/Skill Focus/Traits or even modify the personality and growth potential of my companions.
But I'm keeping it because it seems to run better than this one https://www.nexusmods.com/mountandblade2bannerlord/mods/118?tab=description
Also, the female character is completely naked in the character Creation page of the mod you've commanded ?
The import export are available in the Clan menú, in the first Tab.
Other useful thing is that you can save or load faces, even in vanilla you could copy ctrl+c and save the values of the face, and load some faces like many factors made by the community.
PD: The author of the mod added the underwear if you wanna see it.