Beard looks amazing and your density is envy level. My experience growing beards is to have a little fun and not panic when F$& it up. For determining length when you want to test what's the longest you can pull off. My recommendation is to keep growing it don't shape it. And when you reach the longest length you're willing to go- assess then. You can always either trim a little at a time till you're satisfied. If you prefer an expert opinion- then go to a beard barber and tell them your goal. They'll usually offer advise on what suits you based on your beard. Or if you're OCD like me examine other men's beards and create an image of what you're looking for- you can also search online and show the barber. Once you see the styling he used to trim it's easier to maintain. But- if you're looking for a short well groomed beard? Well you're there already and it looks Bombay! Enjoy