buy and practice with a good quality weapon
I purchased a benelli S90 with an 8 shot capacity and its very effective,
more than a few hogs have found it lethal, obviously decent ammo makes it function better,
an average woman , being smaller in body size than the average adult male, may find a 20 ga shotgun much easier to handle well,
as the recoil level is significantly less,
and while that also means its hitting with a bit less power ,
than a 12 ga, its still significantly more devastating,
at close range than almost any handgun.
for home defense its not like youll need several repeated center mass hits,
too bring an opponent down, a single 12 ga 00 buck cartridge at under 30 yards is very effective
I can assure you 00 buck 12 ga loads are lethal up to about 30 yards on hogs.
past that,
range the buck shot loads will still produce mortal wounds. but results will be much better with 1 oz slugs