Tom’s right on with this one! I tried picking up the Violin many, many years ago after playing the guitar for about 15 years at that time! There is no obvious frets, so if you get lost, It’s much harder to recover from then with a guitar. I too love the sound of a good violin but I recognized right off that I had no talent for it… You should try renting, and trying out both for a while and see which one lands with you….
Oddly enough one of my favorite instruments to play is the harp. Back in the early 70s I thought it was just a back ground instrument until I saw Harpo Marks play take me out to the ball park on one. Well I just had to have one after that. I was surprise on how easy it was to learn to play.
Try not to limit your self to just one instrument… you are young… just imagine how fulfilling life would be if you could master one every ten years!