If you're currently trying to learn guitar, then the advice in the following paragraphs should be of use to you. You can use this wisdom just as much on an acoustic guitar as an electric one, and most of it applies equally across genres, be it classical, blues, jazz, or hard rock. For fantastic acoustic guitars visit www.guitarguitar.co.uk/taylor/guitars/acoustic.

Be A Systematic Learner
Most teachers will educate you about basic chords and scales, as well as some strumming patterns. Good teachers will also provide you useful feedback that helps you navigate frequent beginner mistakes. Then again, many great guitar players taught themselves. These players include names like Eric Clapton and Jimi Hendrix. So, if you want to learn guitar all by yourself, that can certainly work. However, if you would like to learn quickly without picking up any bad habits along the way, systemic practice is necessary. If you choose to forgo a guitar teacher, then stick to high-structure exercises that masters used to achieve their own levels of virtuosity.
Even though mastering your favorite tunes is your eventual goal, you need to build up the right motor skills and technique along the way first. You need to know how you should practice and also what you should practice. Otherwise, you might not really understand the nuance of many songs. Figuring things like this out early can be hard, particularly when you're not sure where to begin. However, apps such as Fretello are around to help out.
Have Patience
Any player wants to learn fast, but persistence and patience are necessary. Personally, I aspired to learn solos and then play them by ear from the start. I didn't know that the faster I tried to learn guitar, the more likely it was that I'd form bad habits and get frustrated. As a consequence, my guitar playing days were done before I graduated high school. If you're going to learn guitar, make a long-term commitment to it. Your playing abilities will grow far stronger because of this decision.
Just keep in mind that consistent practice doesn't have to equate to multiple hours of practice every day. When done right, you can practice just 20 minutes several days a week for steady progress.
Don't Compare Yourself To Anyone
I remember times when I would hear a great guitarist play. I loved listening, but there was always some jealousy involved. More often than not, I wound up feeling like I needed to go home and do more practice. My ego was a problem, particularly when I was jamming with anyone else.
Don't compare yourself to anyone else. Stop it right now. Your only comparison is yourself. Record your playing and then listen to it a month later. That will show you how far you're progressing.
Even if you wind up being another John Petrucci, there are always going to be guitar players better than you. Deal with it.
Start Your Practice Scales Early On
One problem with chords is that you need to synchronize more than one finger all at the same time. That's a tall order for a beginning player. Start with scales, because that only involves a single finger each time. Move up to chords later on when your brain has already memorized scales, since chords are just scale snippets of sorts. Doing this will help you learn and then execute chords a lot faster.
Use The A Minor Pentatonic Scale To Learn Guitar
This scale is a great place to start your learning if rock is the genre that interests you in particular. Many rock songs utilize this minor pentatonic scale. It's also an easy one to learn. Mastering this makes it easier to learn classic rock solos later since you'll be familiar with the shapes. Familiar ground is a great place anytime, but especially if you're just starting out. The Fretello app emphasizes learning of the minor pentatonic scale early on.
Apply What You Learn
Learning guitar playing just by doing covers of songs won't actually make you a better guitar player later on. On the other hand, if you can train fine motor skills using a metronome and build up an effective technique, then you can possibly turn into a solid guitar player. I say possibly because you must apply what you've learned. One common way to do this is backing tracks. You can use these to enhance your sense of rhythm while improving your knowledge of tone, technique, and scales.
That doesn't mean you can learn a few songs or strum patterns; doing so is an effective complementary strategy. It just can't be all that you do. Simplify things as much as you can, and slow down the process. When you take the time to learn rhythms, you give yourself time to get into a good grove. You can loosen up without fretting (pun intended) over playing bad. Feel the music, and enjoy it.
In Conclusion
Learning guitar is possible for anyone physically capable of playing. Technology, apps, and teachers are all available to help you out along the way, but it's your own decisions and mental attitude that will take you farther than anything else.