Just come ask here when you have trouble, and we’ll try to help.
When troubleshooting, the biggest thing is searching the web honestly. But some more things to help you out: look for logs. Linux has loads of logs and sometimes can tell you how to fix the problem.
Logs may not be immediately apparent. Some programs have their own log files that you can look into. Sometimes, if you run the program from the terminal, it’ll print out logs there. Otherwise, you read look through journalctl, although this has logs for everything so might be harder to search.
Another useful tip, particularly for system tools and terminal tools, is manual pages. Just run man ls and replace ls with any command, you’ll get the documentation on how to use that tool.