First of, I know there are lots of similar questions here in Music Stack Exchange. My point here is not abstractly ask whether it is possible at all to learn violin by self study and get a "absolutely impossible, give up" or "if you work hard enough you can accomplish anything in the world" answer; rather, I want to ask those with more experience if I can - given my sets of skills, experiences and constraints - successfully self study violin - and which strategies should I adopt in order to optimize the process.
My music background So, I have studied classical piano for 2 years, but that was 4 years ago. In this time, I continued to play and to pick up some new pieces, but without all that rigorous practice (i.e., no metronome, no scales practice etc). I have a solid understanding of musical theory, I can read sheets effortlessly and I have a reasonably good ear.
Since I was a child, I have always taken a self study approach to many things, generally to my benefit. I'm quite comfortable with the idea of sitting in front of a desk for hours until I understand the topic I am studying. Nevertheless, it is generally a good strategy to give a "boost" in the beginning in order to get a solid base, and then continue by oneself.
So, as for violin, what would be a good strategy in this regard? More specifically, which specific topics (posture, arc holding etc) should I find a teacher to help me with, so that I can go on them and study for myself? (given my current musical knowledge)
I know that any teacher would have a different say about this. My point here is to ask for the advice of those who have either taught or learned violin as to which points they think are really "essential".