I just got back into the game and other than fighting or casting, I can't seem to do any trade levs? I have leveled Alchemy on a character a few years back but when I equip the item needed to swap classes and setup a gear set, what do I then need to do for those crafting quests?

Is there some kind of button I hit? I have two quests now but I still have not figured out how to get to the crafting part and do it.

Thank you.