How can I adjust my website page width and align image sizes?

[Niyyia]

How do I change the width of my website page? When I open my website from my phone, it is too big and up close to the phone. Also, how do I get my collection list page words and images the same size as my home page. ( pictures below) . Lastly, how do I stop the words from disappearing when you click on the menu options….