I would love to learn how to play a violin but I heard that there could be some wrist issues such as if I could not be able to twist/turn it good enough to play with my left hand. I heard if I can't then it's a heredity. Although I can play a guitar just fine.
Is it true about the wrist?

Do you know where can I find the most of classical music for violin or piano of classical composers like Bach, Beethoven, Strauss,Tchaikovsky etc ? I tried online but didn't find much. Like Mozart's Turkish Rondo or Beethoven's Fur Elise, Strauss's Blue Danube or his Tales of Vienna's Woods or even Tchaikovsky's Sleeping Beauty the waltz. Which is the best website for that? I tried looking but it frustrating by not finding much.

Also I know that there are some computer programs that would let me play along with a accompaniment. I was wondering what programs are they, which would let me make my own accompaniment? Youtube guys post their demos.

Thank you!