a few thing to keep in mind:
What type of trigger system you may want? (DOA, SA, DA/SA etc)
Will it be a carry or strictly a range gun?
What caliber/capacity and size gun
Also keep in mind what will fit your hands. Its good to measure your hand and find the grip size of what you may want. I have medium hands so sub compacts and compacts are perfect. I personally don't buy handguns thats not feasible for me to carry either.
There's alot of different trigger system out there. Its best to read up and maybe YouTube different ones.
People will swear buy 45acp or 9mm. Really you need to know what ur comfortable with handle as far as recoil. Price of ammo also comes to play. you have to enjoy shooting the caliber you choose as well.
Sporting rifles are fun,but not practical for edc. I had a custom AR but rarely shot it. I sold it and got 2 handguns. Now a carry everyday and shoot more often. Something to think about.
If you're able test some out at your local shooting range, do so.