Help! Site is taking too much time to load

I’ve created an actor portfolio site for a friend on WordPress using Astra themes, however most of the pictures are in HD and taking too long to load. I’ve tried to convert the image format to webp but it’s losing quality.
I’ve also tried image and site compression plugins such as smush. Nothing seems to work. Any leads would be appreciated.

• This topic was modified 3 years, 2 months ago by Yui. Reason: moved to fixing wordpress

The page I need help with: [log in to see the link]