Beginner, questions about doks, msLinux-sql starting and registry management


my rancher is working fine but as a beginner I ve some questions?
Is there anywhere some documentations/ tutorials and exampes usingr the rancher Web-Gui
How can I start a Microsoft LInux-SQL-Image. The images is starting but because of missing EULA the imange stops after some seconds.
Starting the image on a debian docker is possible, I know the neccessary paramaters but I ve no idea how to use them in the web-gui. My idea is to store the parametes for every start of the image.
Is the anywhere a tool to manage a registry. My registry is working but until now it is ablack box for me.
Thanks for some hints.