Welcome to the forum. You will find a lot of good information here. If you have the time and ability, try and shoot as many range guns or friends guns as possible, as this will make a difference in narrowing down you choice or final pick vs just holding a handgun from the show case. I have found by doing this I started off thinking one model was the right choice then finding out later it was not.
Best of luck in your quest for the right handgun.