Pretty much all that needs to be said about gun selection. Gun that fits me doesn't mean it fits you.Start with one that fits your hands.
Loads of people are too quick to recommend their favorite handgun to everyone else. Personally, I can't stand Glocks. But when a friend was shopping, he found the Glock fit his hands the best. I recommended he get it and he did.
Research handgun fit, then go shopping. What everyone else likes doesn't mean jack if it doesn't fit your hands.
Once you find several models that fit, choose one of those that has a decent trigger and sights. Everything else is gravy.
After that, spending money & time on ammo & range time.
Then spend more money with professional training to develop better techniques.