How to transition from level start cutscene to gameplay?

First off i want to say that i am pretty new to unreal.

So i am making a demo level to show off and i wanted to ask 2 things 1)How do I transition from level start cutscene to gameplay? and 2) how do I make my character bust through a door in the cutscene?

Relevant sidenote i am using the modular warehouse asset for my demo level.