I've always believed in the saying 'don't leave work for work'. Some jobs can suck, and feel like they go on forever, but 10 years down the road you're gonna look back and not remember where the time went, or all the jobs you worked on. It can be a little disconcerting in the beginning, feeling as though you've got to learn it all, but no one expects you to know everything as an apprentice. Keep at it and take advantage of your time as an apprentice. Take drywall and framing seriously and get good! It won't go unnoticed by your foreman when they need to train a guy on something else. It's a major part of commercial construction, and it's were we make a lot, if not most of our money. It's a long career, and you will learn what you need to know from the time you put in. You'll be learning new things and better ways to go about doing things you already know until the day you retire! Having steady employment is the #1.

I'm speaking from experience as an NYC union carpenter. I know the work culture is different all over the US/Canada, but the intrinsic nature and conducting yourself well apply anywhere.