I can't think of a source offhand but it works something like this: If you were to take a 25.5 and a 24.75 scale length guitar and put the same gauge strings on them,then the latter guitar will require less tension to bring the strings to pitch and will for the majority of people feel easier to play. This is not considering the neck shape or radius and the individuals tastes,all of which are huge factors in choosing an instrument. The best advice I can think of for a player of two years,like the original poster,is to get a good setup and take breaks when your hands start cramping etc. For an older player,or perhaps someone who suffers from tendonitis or arthritis, I would suggest they consider the scale length,string gauge, and neck shape to lessen any pain they feel while playing or following. For everyone else you already gave pretty good advice inadvertently in your post,if it sounds good it is good,and to that I will add if it feels right then it is right. Of course,this applies mainly to guitars as this sort of advice could get you into trouble in other areas of your life. :wink: