Can I teach myself guitar?

Yes, you can. Here are some tips: Learn some classical pieces on guitar. Playing classical guitar will challenge you no matter what style you normally play. Classical stuff is difficult on a different level. Take everything slow. Never rush into a new learning process. If you want to improve on something, take it slow, because if you can play it slow, you can work up to playing it fast. It's all about muscle memory. Get out of your comfort zone. Take a few minutes out of your learning time, every time, and just try to learn something different that you're not comfortable with. Break out of your own box.