Stupid Question but Important! HOW DID YOU EXACTLY LEARNED USING “JIRA”?

I am a bit confused and overwhelmed using JIRA and not able to understand how to use it correctly. Like I am struggling for almost 2 months and have seen countless youtube videos, but none of them properly explain the use. They keep on talking about features but do not talk about how to use that feature. Also , is is really good for product management?