Speed up the top page!

Hi there,

I operate golf equipment sharing web service created with Bubble called Rabishare which is in Japanese. (https://rabishare.com/)

I have significant issue on the display speed especially the top page. Looking through the forum, I understood that there are following ideas to get past.

-Apply “Page loaded above unfold”
-Reduce “Do a search for”
-Use Cloudflare
-Use default fonts
-Apply imgix to compress image

As the service was built by other agent and I don’t have highly technical background, I would appreciate any advices what I should learn and start dealing with.