Many people like to learn by example. If they see something they can understand, they have less trouble understanding how it works. That is why people recommended finding a template in your other thread.
If you choose to use a template, import only the tables into a new database, as the rest will not fit your scenario. The imported tables will likely be normalized and possibly joined. From there you can build your working knowledge.
File >New gives you access to the templates. I can recommend Northwind Starter Edition. It is a showcase of what is possible with Access, and it comes with lots of documentation.