In D&D terms (wow i use a lot of that, but it’s so well put together!), charisma is both what you look like and how you carry/present yourself.
So, try some internal magick. As a woman, i will tell you that confidence is attractive, arrogance is not. Gentleness is attractive, weakness is not. Intelligence is attractive, but only when it is also tempered by wisdom. Expand these qualities in yourself, and you have a good start toward charisma.
Another huge thing is attention. When interacting with a person you desire, spend your attention lavishly on them. It will most often get you further than money. Edit- I see this has already been brought up. Seems like something to investigate, doesn’t it?