Everything everyone said already...I am self-taught over quite a few years. The first few attempts were disasters, but I stuck with it,(and ended up with some slightly slimmer stocks!) Patience, concentration, and liking detail work are critical. A comfortable place to work, some sort of cradle or holder for pistol grips, good controllable lighting, sharp tools, recognizing grain differences are parts of it. Layout and maintaining straight lines while going over curved surfaces are key also!
Lately, I like working in a darkened room and using a headlamp and a small side light all with the idea of creating shadow and silhouette in the lines and points - direct light hides inconsistency and developing problems.
Yeah, a thread would be fun. Wallypedal