switching theme

Hi guys,

I hope you’re all doing great.

I’m building a website for a family member but my coding knowledge is pretty limited.

I managed to come up with this

Now, as you may have notice the website take a very long time to load.
After trying to deactivate plugins, install cache cleaner and other stuff, i came to the conclusion that the theme i used called “Make” is to blame.

When i switch to one of the twenty something theme, the website load way faster.

Only problem is, when i try to “clean” the template like i did for the theme “Make” nothing works.
On “Make” i was able to display:none the header, footer, sidebars and also put .content in full width by inspecting the elements in google chrome, getting the id or class name, and applying my display:none to it in my child theme.
Doesn’t work on the twenty’s themes.

Now, since i barely use the theme as a support for my website and not using any of it’s features, is there a way to “port” my website the way it looks now to another theme where i won’t use any of it’s features as well.

Or, can you tell me if there is a way to clean up the “Make” theme to just make it become a simple “support” for all my plugins and css, without messing anything up since i definitely don’t know what s going in most of the .php and .js files (my knowledge goes as fas as HTML and CSS and even then i’m not a pro…).

If i lose stuff like text or link colors or if i have to rearrange some of the aesthetic, it’s fine as i’m using visual composer to make it easier for me and my friend (who doesn’t know crap about building a website).

Thanks a lot for your help guys !