Casting another vote to by-pass bic completely and buy the Zippo (I gotta be honest here - I loved my Zippo when I had it. Zippo rocks!
But yea, the lists can be quite daunting, but like tofu-N-sprouts said, just do your best with what you've got and what you know. It's impossible to be 100% in this very imperfect world so just do the best you can, where you can and it'll work.
If that means being a vegetarian for a while then transitioning to vegan, that's okay. If that means going full on vegan overnight, that's okay, too. It's all in where you feel the most comfortable with things (and what your still, small voice says is right by you to do). And there are some pretty awsome people here that are good with answering questions so don't feel like you have to learn it all by yourself. Just ask an maybe a few of us can "save you some steps" on things.
You asked about the "big ingredients".... I don't know if you're in US or not (US doesn't use E numbers, other countries do) but... assuming you're in US then you'll want to be ever mindful of: gelatin, cochineal or carmine, caseinate, sodium caseinate, casein, rennin, rennit, albumin, egg whites, anything with "milk" in the name (non-fat milk
powder, etc), and whey. Some people avoid anything hydrogenated or partially hydrogenated cause of what it does in the body and a few are super-leery of "natural flavours" cause that could mean anything and I do mean anything
It's a lot to learn but give it time. You're not going to understand everything overnight so again, just do the best you can with what you have and what you know. Veg*nism is a path, not a place so enjoy the path you're on.
Hope that helps a bit.