A friend with a new guitar and no experience asked if it was worth taking lessons. I told him it most surely is, but regardless everyone wants to solo and to do that you need to learn, practice and know scales. A guitar teacher is going to tell you to go practice them.
The Pentatonic scale is probably the best one to start with, especially if you want to play rock ‘n’ roll. I learned guitar and scales from two books: Blues Guitar for Dummies and Uncle Tim’s First Year. Both were purchased after quite a bit of research online, and both turned out to be excellent.
I’ve always found guitar charts to be terrible. Not enough information is contained within them. So I made my own with what I think is the right amount of info to start learning the five Pentatonic scale patterns.