The violin is one of my favorite instruments! I am a musician, a bass player to be exact, but one of the first instruments I really wanted to play was the violin. The sound of it just can't be replaced when it comes to the kind of emotion it adds to music when it is orchestrated properly.
I learned how to play bass by ear, and it took me a great deal of time to master it to the point where I could play professionally with other musicians at professional venues.
I did some research for you and found a really inexpensive program that promises to be able to teach you how to play the violin within 30 days, and they say they guarantee it. That sounds pretty good to me. I just wish I would've been able to learn to play my instrument in 30 days!
I truly hope this is helpful for you.
Cheers, and much success to you!