I forgot to address your additional question, "if in moderation, is it?" so here goes:
What you need to ask yourself is, is it truly skillful to do so? Now in terms of your health, moderate drinking may be seen as skillful. But remember, as far as society as concerned, you're underage and if you are caught drinking, there are legal consequences for you. Now you can say "well f**k society" - and believe me, you wouldn't be the first or the last one to do so. But even that has consequences that you might not be willing to pay. You need to therefore weigh the risks involved in continuing to drink underage and ask yourself "is underage drinking worth the risks involved?"
You've read the Tao of Pooh, so did I. It's a great book for us newbies - but don't let it fool you into thinking that being a Taoist and living in accord with the Tao is all about being happy-go-lucky and easygoing. Anybody can jump into a raft and let the river carry them along its path. But staying on the raft, looking ahead for dangerous rapids, steering clear of them when possible and paddling hard to get through them when unavoidable - these require skill. Same with your life, my friend.
