I think we can now move on and learn the next BIG thing in the world of Database, called SQL. Structured Query Language is the heart of database.
Unlike excel, it's "multi user" and "relational". Excel sheets and files can not be easily used by more than one person. Exchanging data is really a pain in the neck. Again, its not a relational database. You can link a cell from one sheet to another, but there are a lot of problems you may have to face in the process. You can not add "If.. then" type of logical arguments. SQL database is designed to be a "relational" database where you can easily join or link different tables with one another.
Please do not think that it's unnecessary to learn SQL at this time. If you start learning it now, six months down the line you will be glad that you did!