This guide is now live as a web page here.
It covers how to use Role (playrole.com), which is my preferred and supported VTT, Discord, and Foundry (which has a fan-supported system), with links to the relevant resources.
Best of all, it’s all FREE!
Maximum thanks to the backers of the OpenQuest 3rd Edition Kickstarter, who funded all the work that has gone into this as a campaign stretch goal.