Initiate SMS message by keyboard shortcut

In Windows 10, I would like to be able to initiate a new SMS message (and possibly other messaging types) without having to open the Windows 10 app and click through icons and buttons first.  With Cortana installed on phone, I can click Win+S then "SMS Contact name" and Windows will start an inline messaging dialog, which is really convenient.  I'd like to be able to start a new SMS conversation through Join from my Windows desktop just as conveniently.