So you want to know how to learn violin quickly? Well you need to know the right techniques to be able to develop a proper grasp over the instrument and that too real fast.
The first and foremost thing that you must consider is the learning source.
If the source from which you are learning is not good enough you will probably not be able to achieve the aim of learning to play violin quickly.
Trying to learn from books is a wrong option altogether.
The books teach nothing about the instrument holding posture, they hold no demos for you to understand the music and sound clearly.
On the other hand a private tutor might be a good option but since you are trying to learn the instrument quick you can very well drop that idea also.
Hiring a private tutor would mean you will have a session or maximum two session per week and by the time you actually learn to play a song you will realize its almost a year since you began to learn.
So the best option to know how to learn violin quickly is to learn it online.
You can spend as much of time you like and whenever you like.
The online tutorials also come with video demos that help you develop a proper idea about the whereabouts of learning to play violin with additional details.
Last but not the least, to know how to learn violin quickly you must be completely dedicated to the learning process and keep practicing.
There is no alternative to practice.