Let your fingers do the walking! As your small, untrained muscles get tired, larger muscle groups get recruited automatically; watch out for this. If your whole arm hurts, you are using way too much muscle.
Watch my examples and note that my hand is virtually motionless, all the action is going on from the knuckles down. I'm not pulling on my strings, rather striking them with just enough power and at just the right angle to control my tone and volume. This takes time to master, remember that repetition is the picker's friend!
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I find it quite easy (so far!) to navigate, and found the "where do I start" to be very helpful! I'm getting there!!
I LOVE the forum, too. I've never been one to use forums, but the GT forum is full of great people and helpful information at ALL levels! Congrats on a WONDERFUL site!!Good job!