Distributor X,
... I am NOT one to preach,but I will give you my advise which comes from YEARS in the field,as an apprentice,a journeyman,and finally a Master..Don't jump the gun,..put in your time,serve and learn under an experienced Master first,get a "feel" for the jobs at hand,and soak up knowledge like a sponge.You most likely have the advantage over most apprentices starting out because you know product..but thats not everything.
..As I learned a long time ago,..to become a good electrician is to be a good apprentice..If you still feel like you need to take the exam,..go for it,..then you'll find out(the hard way)it's not as easy as it seems... Good Luck,...
Russ