I find it hard myself to find information to simply get things done (i.e., issue certificates) - for users who don’t want to spend time on figuring out why and why not. At EnigmaBridge, @ph4r05 built a DNS automation plugin (for Certbot as most people use it) so we can script things and possibly automate them when the number of certificates becomes a headache.
There is a high-level write-up on my blog: How Certbot and Letsencrypt Work (DNS and SNI-TLS automation). Happy to add more details if it makes sense for someone!
We have spent, and will spend more time on this and we’d like to create some manuals for those who struggle - I hope it’s not just me (for my sanity sake ) so please let us know on Twitter @enigmabridge or somehow.