I would like my droplet to serve HTTPS via Nginx, but I don’t want the DNS records hosted by DigitalOcean. The reason is that I have a complicated set of DNS records at my domain registrar, and I’m certain something will break if I try to move them. (Especially because my grip on the various record types is tenuous.)

The standard HTTPS-on-Ubuntu18.04 tutorial implies that DNS hosting on DigitalOcean is required, but doesn’t come out and say it.

https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-with-let-s-encrypt-on-ubuntu-18-04

So, my questions are:

(1) If I follow the simple tutorial, and keep the DNS records at the registrar, will my site serve HTTPS and will it successfully do the auto-renews?

(2) If the answer to (1) is no, is there another tutorial I can follow to set up HTTPS for Nginx on Ubuntu while keeping the DNS records at the registrar?

Thank you,
John