John Hinchley has bagged what must be a prized domain name of finaletodorico.net, where he offers a series of courses on how to use Dorico.
There's no mention of money, from what I can see, so I think it's just limited places.
https://finaletodorico.net
He's put up a one-hour session on YouTube here:
https://youtu.be/jqBf_weY0k8
And John Barron has done a second Discover Dorico video this month (one last week, one yesterday), which among other things has a sneak peek at a forthcoming release that will let you use the arrow keys to move the "ghost" note up and down, in a similar way to Speedy Entry.
https://www.youtube.com/watch?v=jhguCdTeq0E
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