For any noob starting with Umbrel, first pit stop is … the guides section of this forum.
Is full of useful guides, troubleshooting manuals, how to etc.
In order to have a better diagnose, you need to generate, read for yourself and provide logs if you really don’t understand what is going on.
Here is a simple guide how to generate logs:
http://community.umbrel.com/t/how-to-generate-debugging-logs/
READ your logs and try to understand them. Only like that you can became a node operator.