I've never had trouble installing Docker anywhere, whether from package managers or installers. Where have you, and what kind of trouble? If I might run into something similar down the road, better I should know about it now.
You press "get docker community image". Then you find your distro. Go to "download from the docker store", discover that there is no dowload link https://store.docker.com/editions/community/docker-ce-server... then you click on the long form link to the docs. Which gets you here: https://docs.docker.com/engine/installation/linux/docker-ce/...
And then that is not simple at all.
So much for fat binaries making things easy. Good-ness grief.
curl -o /tmp/get-docker.sh https://get.docker.com && bash /tmp/get-docker.sh
or even just curl https://get.docker.com | bash
You can also use this script to update to the latest version, if you previously used it to install.