Can this site be made simpler for novice to manage?

It’s my friend’s website again…It’s now live and it’s time to pass it onto my friend to manage. He’s much more of a novice even than I am. I’m wondering if I can make the site even simpler than it already is. I’ve set it up to be responsive, creating a PC & iPad version and an iPhone version. Would it work ok on a phone if I cut out the iPhone version? I think this would make it a little bit easier for my friend to manage?

Thanks for any help,

website: (watch out for the GIF)