If it were mine I would get some talon grip tape for it and new trijicon iron sights and a few more mags.
I would get a trigger upgrade kit, I have the same weapon and that trigger pull is super hard for target shooting
Spend your money on ammunition and shoot your new pistol using your stock sites until it becomes second nature.
Frank
IMO, you need to have some spare mags, lots of ammo, a few critical spare parts like recoil springs, and a good comfortable holster that works for you.
I know some shooters like red dots and flashlights, but you should concentrate on the above items first, then get proper training, and practice as often as you can.
Forgot to add a good cleaning kit...you will need that!
Spend your money on ammunition and shoot your new pistol using your stock sites until it becomes second nature.
Frank
NRA instructor, Bullseye master class, and trained daily for 4 years at the Olympic training center
NRA 2700 (22, center fire, 45), for the 22 portion, a Marvel upper on a Kimber frame, center and 45, I use a colt 1911 modified by Jim Clark, many years ago.What is your bullseye of choice? S&W? (sorry to hijack)