Hello everyone. I'm new comer. I've played guitar for just 2 months and I come here with the hope that I can learn from all of you and improve my skills.[br]Well, at the moment, I'm practicing "faded" of Alan Walker. I learn to play from a video on youtube and the instructor introduce a technique called "palm mute" for the chorus part of the song.

I tried but it didn't sound good. What should I do to improve it? Further more, is it harmful to my guitar as I feel I beat mine quite strong?!

And another thing I want to ask is which better? Self-taght or taking a course? Well, actually I practice myself, and sometimes I find it quite hard (encourage, patience) and my friend introduced me a music training app but it is not free so I don't know whether it will be worth my money or not. And if I take a course, an online or offline is better? I just want to get some details information before paying for guitartricks' lessons.

Thank all of you.