Fixing technical issues with 2 x website - based on attachments

Hello! We have 2 new sites and after running a technical SEO audit, we have a list of things which need to be fixed on the 2 websites, for example;

- Pages with broken links
- Number of pages that aren’t indexed
- Oversized images
- Images missing alt tags
- Pages with SEO titles too long
- Pages with SEO descriptions too long
- Pages with SEO titles too short
- Pages with SEO descriptions too short
- Pages without keyword added

Both websites are based on squarespace, so we're looking for a quote to complete these tasks (details included in the attachments)