Website UX Upgrade

I need an experienced web developer to enhance my existing WordPress website. The primary focus is to update the site and stop spam emails and comments from the contact form.

Key improvements needed:
- The website is not currently secured with an SSL certificate.
- WordPress itself needs to be updated.
- Several plugins are out of date and need updating.
- There are more than 1,100 spam or rogue comments that need to be deleted, and comments should be disabled or better protected to prevent this from happening again.
- Navigation: Revamp the menu structure for better accessibility.
- Mobile Responsiveness: Ensure the site is fully functional and aesthetically pleasing on all mobile devices.

Ideal Skills & Experience:
- Proven expertise in WordPress development.
- Strong understanding of UX/UI principles.
- Experience with SSL installation and site security.
- Familiarity with plugin management and WordPress updates.
- Mobile-first design experience is a plus.

Please provide examples of previous work.

I am looking for an economical solution to make some minor updates.

Thank you