This is the place to get started. Try not to get stuck in the "certbot configurator" Most direct options are Linux/Unix(ish) based .. Keep in mind that in the environment you have described, you might want to use a browser based acquisition for the certs... Take a look at the following if you're interested.
With a Browser you can obtain a certificate inside a web browser without installing additional software.
Here is yet another great resource from another local thread .. https://community.letsencrypt.org/t/list-of-client-implementations/2103/4
Might get you closer to resolving your request..
Rip