Why do you say that? Heroic games launcher already exist on Flathub and is super easy to use
It’s really not that hard and there are plenty of guides available. If you are unable to visit the “store” (discovery), download a program and finally run it, then maybe you should just keep using Steam and not complicate things.
I feel like if you are smart enough to know that Heroic Launcher exists then you could figure out how to do a google search on how to install it. It’s not like Windows “just works” every time