NJ_Eric-Go to a range/dealer with a facility to test-fire stuff on site. What I carry as a 4 decade Mil/LEO/Instructor will not make a new person happy. Glocks function well but point high-Gen 4 is supposed correct this to the 1911 grip angle(Does that tell you something?)
Sigs are great, but pricey, P250 series is still a question? Bullet performance (do some internet research) has progressed to an amazing degree in the last 15 yrs. Almost any caliber from 9mm up with quality ammo is a viable defense round. (More internet research-The High Road/Kel-Tec/Hand Guns and Ammuntion Forum are a few. Good luck and welcome to the community.