This guide comes courtesy of LizardKing.
(I’d recommend ignoring the Sig P250 because it is now out of production.)
Keep in mind when selecting a handgun that widespread military and law enforcement usage is a good thing. Not only does it mean wide availability of parts, it means that thousands of other people have already done testing of the gun for you. Don’t be a beta tester on a mechanical device that could save your life.
Don’t sperg too much on “wat gun iz best” or “wat bullit iz best”.
https://www.youtube.com/watch?v=PmUOa5wZHN8 – Good Idea Fairy Ammo
https://www.youtube.com/watch?v=N1_IXxJp4Ik – 3 hour long podcast
You have to sign in to view this one but it’s really good.