Brother, if you search some places, even this site, has many threads with descriptions what is allowed to be trimmed and what is not, with evidences from Qu'ran and Hadeeth. Off the top of my head, cut the moustache and grow the beard, which is everything on the face and under the jaw, to the bottom of the moustache and the top of the jawbone level with your ear. Once it is the length that you can grab in a closed fist, you may trim what comes after. Trimming to tidy it as it grows, I don't feel I remember well enough the rulings so will not comment. (Sorry, I think I didn't explain that well, please verify what I say.)
Why I wanted to respond was to add, Alhamdulillah I find it easy to grow my beard and it is getting very full. I love my beard, it reminds me every day that what I do is for Allah swt, and I do believe it has helped me keep away from fitnah. (I am a revert) It also reminds friends and family, helps them see I am serious in my Faith, and together with my actions, that may rub off on them. As I said, it is easy for me to grow - I would not chastise any brother finding it difficult, but I have found so much good from growing it, I maybe do not really understand their difficulties.
I think yes, there are more pressing matters for you, but I also agree that if you feel to grow it, then MashAllah do so. Every thing you do that is easy strengthens your Faith, and helps you tackle the things you need to try more with.
Edit: There are 8 of these clips, if you have an hour spare, this brother speaks on the beard very well, he covers what should grow etc in detail, and you may find, Inshallah, it helps you speaking to your family:
[ame]http://www.youtube.com/watch?v=ZcGb7coZMm4&feature=plcp[/ame]