Good luck. I use “Trace Down” paper to get the features in the correct places.

Just wondering if you had considered using the “Grid” method ?
It would help enormously in getting the proportions correct.
The other benefit is that (unlike tracing) I beleive that it helps you to eventually transition to just requiring a measurement here and there and hopefully eventually no grid at all.
I think that tracing just becomes a crutch that is almost impossible to transcend.
Either way, it is very difficult to get those proportions correct without some form of measuring assistance, at least in the initial stages.
Another point is that the reference image you are using looks very “flat” to me, i..e not very much contrast between lights and darks and therefore very difficult to interpret – the drawing would also be quite flat.