In short, this is a kick-ass... It would seem that an elementary model, well, what could be easier? ))) But the devil lies in the little things, to make a photorealistic glare, you need to model carefully, preferably under a subdive, well, or to smooth it out later without problems. Fortunately, I once took several courses a long time ago, where they gave advice about modeling under the subdiv and I managed to do what you are now contemplating! I also advise you to evaluate the video, at the end I rendered an animation, which took a lot of hours... In general, evaluate ;)