AE is not a video editing app, so the default setting makes sense for most comps. With one or more layers selected, pressing the left square bracket key ([) will snap a layer's in-point to the current time. Using the right bracket key will move the layers outpoint to the current time.
The default preference is to have new layers start at the comp start time. You can change your preference by pressing Alt/Option + Ctrl/Cmnd + ; and turning off Create New Layers at First Frame.
Thanks I really appreciate that! I know its a pretty basic thing, I just have a hard time maintaining focus on a 60 minute video on all the intricacies of the program.
It's a really bad idea to try and cut a 60-minute video using After Effects. AE is not a video editing app. It is an app designed specifically to create motion graphics, composites, and animations that you cannot create in an NLE like Premiere Pro. Most comps are a single shot. Most shots in a movie are less than seven seconds long. Most AE comps created by professionals are, therefore, under seven seconds. Use After Effects to make effects shots and use Premiere Pro to edit them into your 60-minute movie.