I recently purchased my first pistol for home defense. I selected the sig p220 over other brands because I personally felt very comfortable with it and can't wait to take it to the range. CA laws, I have to wait 10 days...well 7 more days to go now.
You picked a good weapon. Now get all the practice and training you can. Then get some more
I don't know your gun history but if you haven't you might want to check out an NRA safety course. If you have or had that kind of training before then get some trigger time. Man those 220's are fun to shoot. And usually spot on target