Hello, my name is Andy and I'm a newbie.
How can I publish my game and play online on my own webpage?
You need to have Quest running on the webserver. So you can either publish it on this site and link to it from your own site; or you can install Quest on your own server (which is a big task, but I think a few people have managed it now)
Ok, if I want to sell my game in itch.io, for example, I could to publish my game as private in quest website and give the link to my customers in itch.io?