Great gun, congrats. You'll enjoy this gun for many years. Glock-43 in another one you may want to look into.
I have my P-365 and she will take any ammo you feed her, including reloads. HST's in 124gr. is currently the way to go. The 147gr. and the150g. also good. The 150 gr. Micro is specifically for those with 3" bbl.
The P-365 is comfortable to wear for hours at a time.
Invest on a magazine loader. Loading the P-365 magazine in a bit stiff.