No templates for this kind of thing as far as I know. I've built my own using html/javascript/css from the ground up using the eventsocket and MakerAPI (documented in this (long but interesting) thread, and more specifically here, and awaiting a fuller write-up when I get the time). I'm also not a full time coder and it's taken ages. Here is where I got started which may help you. But I'd say unless you have time to spare and a good working knowledge of front end design (html/css/javascript etc) then maybe stick with one of the commercially available options or the excellent dashboard options on the forum (eg. Smartly, which helps smarten up the out-of-the-box dashboard or the great Android​ dashboard app here).
Download the Hubitat app
