I don’t believe you would need a load balancer based on the environment you have described. There is a tutorial by Mark Drake that is probably better suited to what you are trying to achieve, the link can be found below.

Happy encrypting.

https://www.digitalocean.com/community/tutorials/how-to-secure-nginx-letsencrypt-freebsd

thanks, asciant
This article helped me to understand!

Yes. Thank you very much. However, when I click on the link provide I get a page not found. This is where I found the tutorial you referred to.
how-to-secure-nginx-letsencrypt-freebsd

There seems to be a prepending http:// to https://