Yes, you can be an Adventurer and Artisan at the same time.
Adventurers get exp by killing stuff. Artisans get exp by crafting stuff.
Right click your exp bar to change the view between Adventure/Artisn exp.
Type "P" and that will bring up the Persona window. You will see both exp bars telling you how far along you are for both.
Here's a link to a great crafting site.