Then there are types of music to play. Guitar works well in virtually every style of music. Of course rock, metal, blues, and country, to name a few, simply wouldn’t be the same (or even exist) without guitar. You can easily spend a lifetime playing and not master a fraction of the styles of music out there. But do yourself a favor and be open to other styles of music beside your current favorite. You might be surprised to find out how much fun it is to play a new style of music.
Learning to play guitar is another area where player opinions vary widely. Some go the “self-taught” route by watching videos online, or downloading TABs, or having a friend show them some chords, etc. If you choose this route, there are several hazards to watch for. First, the free stuff online is usually worth what you pay for it. Sure, there are some good lessons on YouTube, but you will spend countless hours wading through junk to get to the good ones. Online TABs are also a very popular way to learn songs. Although, in my experience, about 75% of them are incorrect. And they are copied from website to website, so the bad ones multiply along with the good. Remember to take them for what they are: someones idea of how to play the song. Not necessarily the only (or correct) way.
Some choose to take lessons, which being a guitar instructor myself, I fully recommend. Of course, there are bad guitar teachers out there, but if you find a good teacher, you will progress much faster and have a better understanding of music than you probably would on your own. Plus you will have someone to answer your questions, get advice from, someone to play with, and a person dedicated to helping you become a better player and musician.
source : Mark Starlin - betterguitar.com
