I think this will answer your question.
At tier one (lvl 1 to 9) you can do ALL artisan abilities - alchemy, cooking, weapon making, etc. It has NOTHING to do with whether your adventuring class is berserker, summoner, or whatever.
To become a lvl 10 artisan you must narrow down to a scholar (alchemy, jewelry, and scribing), a craftsman (woodworking, carpentry and cooking) or a provider (leather, metal armor, weapons). This is tier 2.
To become a lvl 20 artisan u must narrow down to one of the three you picked in tier 2.
Again it has nothing to do w/ your adventure class.
To the person who didn't do the artisan quest on IoR:
Go to a newbie adventuring zone and look for minable rocks. Mine them for tin clusters. You need several of these.
Go to your town. Look for a cellar door and hail the npc standing there. Most won't let you join but keep looking. Eventually you will find the one you CAN join - just say yes to him and you can go in.
You will find a trade skill instance - a sort of dungeon filled with work stations - and a merchant. And a broker.
Okay, if u have 4 tin clusters buy 4 fossil tempters and 4 coals from the merchn.
Go to the forge. Find the recipe for tin bar and make 4 of them - we all start w/ this recipe. It's pretty easy, and tis lowbie stuff is almost no-fail.
Go back to merhc and buy 4 more fossil tempers and 4 more coals. Go back to forge and make 4 tin spikes. Again u start w/ this recipe too.
Now you should definitely be artisan lvl 4. Go to merch and buy the lvl 4 recipe book, rt. click it, and "scribe". Now u can make more stuff. Rinse and repeat. GL
Note - google "eq2 artisan help" or something like that - visit as many artisan specialy sites as u can. Like www.eq2.eqtraders.com. GL