My web site it's very slow..:(

Hello,

Please let me know if you have any ideea how i can increase the speed of my web site.
I use directory themes V 8.3 .. i like more that 8.8 version.

So, the big problem it’s the server reponse. On the same server i have also 2 web site and the page speed it’s very very good. So the problem it’s not my web hosting, The proboem it’s not the images, because i have smush images instaled. The problem it’s the theme !

Any ideea how i can solve the speed problem for my web site?
Maibe the framework?
My web site it’s : https://www.turism365.com/

Many thanks’