Wordpress Development and Optimizing website (repost)

I'm posting this project again as the previous provider was not doing a good job
I am looking for a WordPress developer who can help me with the development and optimization of my website. www.wedoadz.com

We are a free classified website and blog website.
As far as I know, my website has some problems. The loading
The time is about 5-10 seconds.

I'm looking for reliable professionals who can get by with a bit of perspective
listed below but not limited to.

Conduct a complete website health check.
Fix WordPress and hosting issues.
Investigate and fix errors (nginx, php-fpm, ssl, wordpress
error, domain, CDN).
Domain, DNS and SSL troubleshooting.
Debugging site performance (php workers, checking WordPress error logs,
Etc).
Sort out SFTP, SSH, phpmyadmin.
Or anything else you might come across.

How we can initiate this.