" it's just I've heard that my picking hand will never be as good as it could be if I were picking with my left hand."

It's probably baloney. If you touch type, isn't your right hand as good at hitting the keys as your left? The movements in typing and picking are much the same.

Typing and picking are skills, and the right hand learns them. Your brain has something like 200,000,000 cells and a trillion connections. Given patience and practice, it can do amazing things, including telling your right hand to pick.

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Are you a true lefthander ? See questions above. Or did you get the label simply because of the way you write?

There have been studies which show the labels "right-handed" and "left-handed" are oversimplified. Observers have learned that for many taska, people use one hand one time, and the other hand another time. Often, people cannot tell you which hand they use to do a certain job. (Obviously, writing is an exception.)

For example, I wash my contact lenses with my right hand and put them in with my left hand. I did that for years without noticing until one day when I had a cut on my right hand and couldn't use it to wash them.

So, I am right-handed or left? There is no simple answer.

Ignore the people who tell you won't play as well. They are probably just part of the great "You sit down and shut up" conspiracy.