Welcome to the beard board. Considering that you have only been growing your beard for a weeks, I would say that you have made good progress. Those growing full beads are normally advised to grow for at least 3 months before trimming it lengthwise, but a minor trim can also remove scraggly hairs and clean your beard up. Carving a neckline, even early on, shows that you are intentionally growing a full beard instead of being too lazy to shave. Look for the post by wulfpaul (I think) on carving a neckline which seems to be the golden standard. That being said, there is also the 48 hour 'rule' which people recommend before making any changes. Keep growing.