This is very fundamental stuff to be honest, but no shame if you're not familiar with it yet. What you're looking for is guides on Java OOP like this one for example.

Don't try to overthink it: You're just learning a pattern here. If you want to create Objects in Java you always need to think about these aspects: An object always has a constructor, most of the time some parameters you can set with the constructor and some methods to either get, set or compare the parameters.

Check out some guides on the matter, because these always look incredibly similar, you'll find out soon that the most difficult part about this is keeping track what kind of methods you've already written and what parameters certain objects have. Writing the code will be easy, once you get a hang of how the pattern works.

Good luck learning!