You have plenty of time to decide if you're waiting for the end of the year. Take advantage of the offers members like Devil Dog have made, and join them at the range. Attend some of the MGO fun shoots, lot's of members will be present, and most are very willing to let you try their guns. Don't overlook a used gun, either. You will probably have a larger selection of choices that fit your budget (plus additional mags and other gear), thus leaving you with a few extra bucks for training ammo. Which will lead you into reloading, so you can shoot more - but that's a whole other thread for later.
Personally, I like my classic SIGs for carry, my P229 (in both 9mm and .40 S&W), along with my P220 and P225 (yeah, I know, the latter two are single stack, but I just love how they shoot). You might also like a compact CZ (e.g. the 75 Compact, or P01).
As others have posted, along with your carry gun, you will need a solid belt and holster. And, training - lots of training. MDFI is one of the go-to trainers here on MGO, but there are others. If you go the MDFI route, I suggest you start with the You Suck, It's Not the Gun class. Many advanced/experienced shooters here have attended the class, and have learned a lot. I've attended a couple of times, and have learned something new each time.
Enjoy your journey, and keep us informed.