Help my beginner as* grid

I am a student new, to webflow
when i’m trying to put a grid 100 VH
when i insert photos the grid is overlapping other sections
I tried different settings
maybe i miss something in the setting
i’m sure it suppose to be not that hard
pls pls help so i can get my homework done
thanks!


Here is my site Read-Only: https://preview.webflow.com/preview/noam-shs-exceptional-project2?utm_medium=preview_link&utm_source=designer&utm_content=noam-shs-exceptional-project2&preview=d5ed0f4e8664598ea806247758d60e7c&mode=preview
(how to share your site Read-Only link)