there's not a thing wrong with it. Right now the economy being what it is, if you have a chance to learn a trade that will help you get a job and hopefully stay employed - thats a great route to take. It means you can earn a living while you attend school for the next degree you want to...
your question is too general.
What type of history class are you in? American? World? Anicent?
if it can be any topic - here's one that my son wants to do - compare modern Christianity with the ancient Greek and Roman myths - there are alot of similarities in the stories.
Zeus is God
Hercules...