Landing page as in video

Hi. I have the latest GP Pro and I had to uninstall Elementor as, apparently, it was clashing with my LMS. I am very happy with my menu but no with the rest of the landing page. I did try to recreate the one you show on your website (sections) but when it came to the info in columns ([/lgc_column] [lgc_column grid=“33” tablet_grid= “50” mobile_grid= “100” last= “false” style=”padding:30px;”]) it didn't. I transcribed the code you used but it doesn't come out right.
I know nothing of CSS, PhP, and et al, so I was wondering if it was possible to fix the code or if you have a template I can use, I only need something very simple that doesn't look like it is now.
Thanks!