BudsGunShop.com - Quality of Gun

The Ruger Security 9 is an excellent handgung, and would serve you well as a home defense, weapon or an everyday carry piece, as long as you don't mind carrying a full size gun, some smaller in stature people don't like carrying full size guns as they can be harder to conceal, I'm 6'2" 210 and can conceal a full size pistol with no issues.
This Pistol is a work horse and is well built, I e seen some complain that the trigger is not the greatest, but it is still reliable, durable and as accurate as the shooter. Especially at self defense distances.
Id also give you warning that after market support is going to be limited when compared to lgock, and SW (stuff like holsters, replacement sights, and trigger upgrades) there is some after market support just not a ton. But really after market upgrades aren't a necessity.
As far as ammo 9mm ammo comes in different bullet weights (most common 115gr, 124gr, 147gr) i recommend getting the same weight practice ammo as you get for defensive ammo, I like 124gr, training get standard ball ammo,, and defensive get hollow points or frangivle ammo, as far as Brands go right now any thing in stock an affordable, when ammo production catches up to demand Blazer brass, and federal T&P for training, and Speer Gold Dot or Federal HST for defensive ammo.

Willie, yes Sir. The Ruger Security 9 is an excellent pistol for beginner through experienced users. I standard 115gr full metal jacket for practice and either 115gr or 124gr Jacketed Hollow Points for self defense will cover you nicely. Cheers and stay safe!