I think several handguns, including a .22, .380, 9mm, and a .45 so I can get an idea which one I like best. Also maybe a rifle.
.22 is too small and .45 is too big for a gal IMHO.
9mm semi-auto is your best choice but it too may be a little strong for you. The .380 is a little under powered but may be your first choice.