at the moment there isn’t a way to subscribe to our knowledgebase articles, because we have some issues with rss feeds creation due to our multilingual configuration, but we are working on this to provide a rss feed
Edit : Our RSS Feed is back online, and you can use the feed reader of your choice or susbscribe using Feedly
About wildcard certificate, just use the command
ee-acme-wildcard, and you will be prompt to enter your domain name (without www).
To use the Cloudflare DNS API, you only have to use Cloudflare as nameservers for your domain, and to get your API key in your user profile page. The script will ask you what is your API key and your Cloudflare email address and will use them to issue your certificate with acme.sh