Problem with equipping weapons

[Enkidoh]

Yes you do, you retain all the levels and exp in your earlier class (each class has it's own individual exp and levels). So accept the quest at the ARC's Guild, and then you will be able to change to it and start levelling it - you will know you've unlocked it as it will say "Archer Unlocked!" at the very end and a help message will appear on screen instructing you on how to change class. (When you wish to change back to THM just equip your wand or rod again).