There is no actual manual renewal process? I’ve already posted detail for my situation separately at How do I renew a 90 day cert with time left before expiration?. My site is hosted on a shared-server Cpanel account at GoDaddy. The cert expires 10 days from now.
I don’t know much about how certs work, nor about Let’s Encrypt (having had the Letsencrypt cert only about 5 months), and last time it had expired so I reinstalled it or whatever. It sure would be handy if Letsencrypt had a page dedicated to the manual renewal process. The Letsencrypt site seems geared much more to server admins managing many domains as a full-time job. I’ve built shared-server websites for 20 years, manually coding HTML/CSS and managing via FTP, but sorry, although hosting services have made cert installation a lot easier these days, 99% of this cert and server stuff is over my head.