I need technical SEO issues fixing for my website.

I did an analysis of my website and this is what it need to be fixed up.

1: TAP TARGETS:
2: RESPONSIVE
3: MINIFIED JAVASCRIPT
4: MINIFIED CSS
5: Make fewer HTTP requests
6: Compress components with gzip
7: Use cookie-free domains
8: Add Expires headers
9: Mobile: Rendering & Viewport (The content does not fit within the specified viewport size.)
10: No Twitter Card was found.
11: Analytics (No Analytics Technologies were found.).
12: https://validator.w3.org/ (it shows some issues)
13: Google’s PageSpeed (desktop and mobile)
14: No associated LinkedIn profile found linked on your page.
15: No image meta tag found
16: Remove inline CSS
17: Preferred domain is not set
18: Cannibalize your IP address
19: Site should be accessible via HTTPS (SSL)
20: Image elements do not have explicit `width` and `height`.
21: The DMARC record is missing.
22: Heading elements are not in a sequentially-descending order
23: broken links.

Please send me and offer, and the estimate time to fix it up

Looking forward.