Galaxy tutorials, including those for variation analysis: https://galaxyproject.org/learn/
All Galaxy tools: https://usegalaxy.org/toolshed/
Ways to use Galaxy: https://galaxyproject.github.io/
Public Galaxy servers should never be used with clinical data. Setting up your own private secure server based on your project's requirements is best. That said, reviewing domain-specific public Galaxy servers can be a way to review novel tools and workflows before setting up your own server. Each is independently configured and administered.
Public Galaxy servers: https://galaxyproject.org/public-galaxy-servers/
Thanks, Jen, Galaxy team