Forum accounts are tied to characters in some way, probably related to registration woes.

Not sure about your carpenter issues. As long as you've been going back to the archer guild every 5 levels for new quests, you should be reaching a point where you can talk to whoever at the front desk to get you started. You're completely free in the game to pick up any classes you want, but you do need to progress through some early story stuff probably before the game starts unlocking those things for you.

Crafting is subjective. You likely won't be too great unless you pick up every crafting class, simply because they all offer a few skills that every one will use as a cross class ability. It can be pretty easy to level up fast, though. Between leves and turn-ins, some players even pick up with an FC or have friends craft all the items for them to turn in. If you find someone high level willing to help, they can craft what you need no problem, and you can power-level crafters very quickly.