Learning Jira is not at all difficult. In case you want to learn it then you can sign up for a free cloud instance and get started in few minutes which is great however you might be overwhelmed with so many things in the beginning and that is why I have created various courses to help you out. You can take a look at my courses here.
These courses are like a bundle of various types of content that I produce on a regular basis. Most of them are videos from my YouTube channel.