I very much doubt that drone will fly a GoPro. If you upgrade the motors you will destroy the ESC’s or drain the battery much faster. Adding camera weight will also mess with the CG, battery life and flight characteristics.
Pre built packages like that are not designed to be rebuilt. It’s not a freestyle/racing quad that you can upgrade. You should have built a 5” if you want to fly a GoPro easily.
I have been flying FPV for 8 months, I only just started flying a GoPro, it was a $100 used session, I wouldn’t fly a Hero7 yet, I couldn’t afford the crash!
If you are learning I would advise flying something much lighter and cheaper. You are not going to need 4K video and superview whilst you learn, 1080 will be more than enough. Film in 4:3 and use stretching software to emulate superview without risking an over heavy quad crash and loss of a $400+ camera. Losing or smashing a $25 808 is much cheaper. Wrap it in orange tape to help find it when it falls off.