AR. Get an AR. It's the most modular firearm in existence. I would argue much easier for a woman to shoot than a pistol. Tolerances are tight, maintenance an be sparring and it'll still shoot as long as it's not bone dry.
I have an assembly guide.
Discussion
for space wise and easy accessibility, an ar would be kinda hard though. it’s so obnoxious and not easy to shoot with as a woman. fun, but extra as hell.