Start by getting yourself a copy of the ABC's of Reloading and while you're waiting, read everything at the top of this forum.
Full length sizing is nearly essential for reliable function in autoloaders. You might be successful with neck sized cases for one or two reloads, but when the case bodies stop springing back you will suffer failure to eject malfunctions.
Neck sizing is a usable practice for bolt guns. I wouldn't use it for tactical rifles or hunting rifles I took on an expensive trip. Whether it improves accuracy is strongly dependent on the rifle and bullet you use; the rifle has to be very accurate to show an improvement from neck sizing only. Case life might not improve, either. There's no way to make that blanket claim. I loose .223 Rem cases due to loose primer pockets, and very rarely split necks or shoulders.
A beginner should probably consider neck sizing something to try after he learns the fundamentals, including how to full length size a case so it fits and functions in the chamber.
I dislike lube pads and won't use them. I recommend either Dillon or similar spray lube, or better yet, Imperial Sizing Die Wax. Don't use Hornady One Shot.
Lube the body, neck, shoulders, and add a little inside the case neck.