Sorry to sound naive but I was wondering if anyone can tell me what's the differnce between a danceline and drill team.

It depends largely on which region of the country you're in. Sometimes there is no difference. But the simplest answer is that drill teams do drill - military style formations. But even that is a big generalization. Often, the terms are interchangeable, but different people have different opinions about that. So don't feel bad that you're confused.