Very good beard for one month, and I'm sure it will fill in more after a few additional weeks growing. I think you are right in aiming to grow for 8 weeks before doing some serious trimming because by then you will have plenty to work on. As it is, it looks good now and is definitely a keeper. As margus says, the cheeks could be fuller but they will improve with time. Alternatively, you could carve them out if you wanted.

Keep growing. Stay bearded!

wulff