First of all: Welcome to the community!

With regards to your statements, you should already know what making games is difficult, but making online multiplayer games is even more so. HeroEngine makes it easier for you, but not simpler. It will always remain a daunting task.
I would first start of on the main wiki-page, and that you learn about the tools first (Area Manager, Properties Window, Console, Chat, Render Panel, ...) and start building your own areas.
There are also a number of GUI tutorials on the wiki, but if you really want to get into it, I suggest AFTER you read the wiki-tutorials to dig into the tutorials posted by users.
If you do not have previous programming experience, and although HeroEngine was designed and somewhat built for users without serious coding knowledge, it's actually not so much so. Making online games does require several years of experience before you can make the jump.
What can you do best? Start of with there and show it to the public, maybe you will get some more people along the way