Wildcard SSL with LetsEncrypt

I’m running HestiaCP on Debian 9, and I am loving it so far – it’s a great panel by far… but where I’m lost – is I run on one of my domains, a WordPress Multisite. How can I get Wildcard SSL set up to work with the subsites (subdomains across three domains) and with the original domains themselves?

All of my domain names right now are currently at Name.com - and I just have the records set up pointing to the IP address of the server from there, but if I need to change that configuration and do something a little differently, I’m willing to, as long as I’m pointed in the right direction with good instruction.

Thank you so much and keep up the great work!

i also has all of my domain on name.com basically you can create one web site into Hestia like admin.domail.tld and generate the SSL on name.com just create one record type A admin.domain.tld and point it to your hestiacp IP.