To start with it is very important search out for a capable and experienced instructor. He should be a competent and qualified professional to train a beginner. So it is necessary that the student learn about all the details related to the teacher before he joins him as a learner.
The next step after finding out the right teacher it is necessary that you are clear with the type of music you are interested and wish to learn. You can make clear that the teacher is ready to teach the lessons you wish to learn as you are the one who is going to pay for your lessons.
The person learning guitar should be determined and sincere in his learning that he should practice his lessons even after the classes. The teacher provides lessons only once or twice in a week according to the convenience and this is not enough for a beginner to become a good guitarist. So it is up to the students determination and practice that he excels in his classes mastering the chords, songs and playing the guitar.
It entirely depends on the student how motivated he is and the practice he does that makes him a great guitarist. Every good guitarist would have taken great trouble to build up his career. One should learn to rectify and learn from his mistakes. Set a target and do not lose heart before you achieve it. It is this effort that makes one a great and good guitarist.
Last but not the least learn guitar with fun. Never force the song you do not like to learn or later regret it for it. You tend to learn better when you enjoy doing it. Ask the teacher to teach the songs and music you prefer so that you are more inclined towards it with interest and enjoy the classes. Thus with determination and dedication along with the guidance of an experienced and competent teacher, learning guitar online is quiet easy now and you can learn the lessons of guitar in no time and become a master in playing it.