From your description of the situation, I take it you're an individual who has editing experience but no After Effects experience. You need to know that AE isn't the kind of application where prior knowledge easily transfers to AE proficiency. With this app, you need to begin at the beginning... which you will find on this page. The most important stuff is right at the top, namely the logic behind the workings of AE.
It really will help, and it's a LOT more time-efficient than constantly asking elementary questions in a forum, then waiting for a response.
What Dave said - start with the basics. Effects are applied to layers in comps, not imported source footage.