@hazardwarning OK, this page [indieweb.org] gives details and is updated as things crystallise. (Also gives physical HWCs in case you are able to manage one of those.) And folks are very helpful. I wrote about [Wednesday's V-HWC}(https://stream.jeremycherfas.net/2017/the-value-of-explaining-yourself) and there are lots of other bits and pieces on the indieweb wiki.
The next one will be in two weeks time, on 26 July.
// @matigo