Lessons for Violin

I am 22 and I’ve always wanted to play the violin. I have been playing the guitar for several years now (so I know a few things about music) but I have never even touched or picked up a violin in my life. I am looking for a good, affordable beginner’s violin that is geared more towards classical music rather than fiddle music. I noticed that there are several different sizes as well. I have smaller-than-average hands with slim fingers. Should I get a smaller size? should I take violin lessons? is it possible at
all to be self-taught with the violin?

Jeff asked:

I’ve been playing the guitar for about 6 years now and well, I think I’m pretty good, I’m mostly into neo-classical music like Yngwie Malmsteen so I’d like to learn to play the violin.

Is the violin pretty easy to learn and get used to really quick after playing the guitar for a while?

Also, what kind of violin should I get? I know I would have to spend a few hundred for a good violin, but I’m just looking for something cheap (under $100) to learn on first and see if I like it. Should I look in music stores for a cheap violin or should I just shop online?