Are you shooting a Red Dot or Open sights??
When I shoot (and was taught) to shoot both it was both eyes open. This is definitely harder and takes more practice and a tad more brain power until it's second nature. A red dot is 100% both eyes for me and open sights are probably 80% both eyes depending on the distance and size of the tgt. Keep at it and it will come more natural.
I'm partial to STI as a brand, but 9mm hands down (more capacity and less felt recoil). It's a little cheaper as well, but if you have a .40 I wouldn't "not" shoot it just because it's a .40. Shoot it if ya got it.
Greetings... I've been shooting my whole life off and on but recently have started getting pretty serious. I've purchased a few higher end pistols for hopes of USPSA comps, as well as 3-gun. I am an absolute beginner at reloading but taking a stab at that too. Hope to learn a lot on here and maybe pick up or trade for some new Boom sticks.... HTTR.