AR Pistols are very popular around here. There are several very good threads on them here on Taurus Armed.
These are my 9mm AR pistols
This is my .300BLK
You don't need any skills to build an AR pistol, any more than you need skills to build an AR. If you are building a rifle caliber AR pistol, you just need a pistol lower and any AR upper. I would advise against a .223/5.56 pistol upper as they are extremely loud and throw a long flame, even the blast from any thing other than a flash can can seriously harm you, or those around you. Pistol Caliber AR pistols are good, and even easier to build (no gas tube or gas block), but I would match my upper and lower receivers due to the diversity in designs right now.
I like .300BLK subs in my AR pistol, but even .300BLK supersonics are not bad. Ask Olfarhors, I talked him into a .300BLK pistol shooting subs for home defense and he loves the thing.
If you just don't want to assemble anything, there are still two ways to get them, either purchase a complete AR pistol, or buy a complete pistol lower and a complete pistol upper. If you can field strip your AR for cleaning, you can put an upper and lower together.
I prefer a complete AR from PSA over any of the assembled brands because I know PSA uses full MILSPEC parts without cutting corners, like I see on most brand name basic ARs. Rumor for quite some time has been that PSA parts are defense contract over runs from FN, which is not far away. Some complete uppers come with or without BCG and Charging handle. This is not a bad thing if you have your eye on a particular aftermarket CH, or a BCG with a coating. Again, if you can field strip your AR for cleaning, you can install these parts.