Use my iPad Air as main computing device

Hey gang,
Starting to redo my studio and the focus of it is an IPad Air 3 with lightening connection. I was wondering how to hook it up to bigger monitor for video editing and photo editing?
Also I have a western digital external drive with ton of files on it and how to access it. My pc is on its way out and I don’t want another one gong forward. Just want to use iOS.
Any suggestions?

Use this to hook it up to a monitor
Use this to hook it up to an external drive