stringy said
You will definately become adept at violin, trust me. Remember you are doing this for yourself. I personally really like your arm movement, to me at least I think it looks really good, Heifetz held his arm high, take a look at him on you tube, he was technically unsurpassed.

You can become as good as you want to be.

  

It's possible to play really well with a high elbow, but it increases the chance of injury. I used to play with a high elbow, and got into a semi-pro orchestra with that high elbow, but also suffered from upper back pain that went away when I changed my bowing technique and kept my elbow lower.

Also note that Heifetz used a Russian bow hold, so his hand and arm mechanics are different. The Russian bow hold does call for a somewhat higher elbow, but not to the point where the arm is pressing down into the string; the arm must be higher because the wrist is higher. Heifetz's elbow still only rarely rose above his wrist. I would not try to emulate his arm without a good understanding of the rest of his bowing mechanics. Just saying "Heifetz held his arm high" is something I would consider extremely risky advice.

(Edited to elaborate more on Heifetz and why emulating his arm is risky)