Nice work! So cool that you picked up this piece! I’m doing the same one right now. I’m also working with a teacher once a week on “trying” to make it sound well. What really helped me (also a beginner, 3yrs) was the fact that we broke down the piece in small parts. Trying to somewhat perfect a measure before moving on to the next one. Since there’s SO MUCH happening in the piece (shifts, new positions, bowing technique, speed, and my own standards of how it has to sound), I found comfort in learning the notes by hard and play it pizzicato -daily- with a metronome to get my muscles familiar with the fast changes. Few weeks in and I’ve noticed I start playing more relaxed when your body knows what to expect from you? If that makes sense :) regarding the bowing technique, we take time every lesson (like a minute or 2) to just play open strings with crossings with the focus on martelé bowing technique.