I think fiddlers are born, not made. If you've been playing and don't hate it yet, then you should probably keep going. Lessons would be good, it is true. But if that's not possible, get new strings and make sure they are tuned to the right pitches. Not just tuned to themselves, but tuned to the frequency the instrument was designed for. If your hand or arm start hurting, stop practicing and seek expert advice.

And remember - "violin" is an instrument. "fiddle" is a verb.