Optimize a WP Website

The website is in Wordpress have around 15 pages. Website is in to Gymming & personalized training. I would like the optimize the following points for all the pages: 1. Pageload speed improvement (Show report of GTMetrix, >90 Score, Page size <2 MB) 2. CSS validations (W3C CSS Validation report) 3. HTML validations (W3C HTML Validation report) 4. Implement SSL Certificate 5. Optimize the Mobile experience (As per Google Page Insights, score on Mobile & Desktop >90) 6. Fix the broken links (Apprx 6, Give 3rd party test report) 7. Add Alt-attributes to images (10 Apprx) Pls Note: No 3rd party website dependency allowed other than google. All css, js, font files must be hosted on our site. No urls of other non-affiliated entities other than google allowed anywhere is source code. No unsecure plugins be used. No paid plugins be used. Ensure that there is no data loss or disruption to the exisiting live website. So please take back up & upload it on cloud & send us link before working. Ensure that there is no change to any exisiting plugin or integration or responsiveness issues. i.e. Google Analytics or other plugins You have to give us the list of Plugins that you have used, and why & where you have used. Delete all unused plugins, pages, images that are unused. We will make the final payment after verification of your work. Budget: 2500 INR Apprx Timeline: 3 days Payment: 10% Advance + 90% After completion