Tidy up a Wix website

Description

I have been building a small website on Wix for my occasional music venue. It's four pages plus the subpages for each gig. The design is pretty much complete, but I am aware that it is not all built well, especially the parts that are supposed to be created from a CMS (to be honest, I'm not entirely sure that a CMS is appropriate, but building it without one and making it look professional has also not worked). I'd like someone to tidy everything up, deal with the multiple issues with the dynamic pages and with photos that don't fit the spaces correctly, make it look ok on mobile and do any SEO that is possible. I assume this is not too huge a job for someone who knows what they're doing. Please save me!