Following is a brief explanation of your +sheet:
Stats - The stats are the main items of your sheet. Without higher tai, nin, and gen stats you won't be able to raise abilities. Stats also stand for how good your aim is. A stat of 1 means that you're probably not going to hit very often. The rest of the stats are more for RP but also will tell about how strong you hit for tai and nin with strength and intelligence respectively.
Styles - Your styles are what combat types your character specializes in. Your styles can never go above the stat for that style's type.
RP Skills - Just like the name says, these are skills that are RP oriented and are more for whatever RP is done outside of combat. The higher your skill the better you are at that item.