If you have them installed, you'll see a menu of database templates. These offer useful but simplistic examples, and some time you ought to have a look at them. This is the place to architect the guts of your database. Before we can do anything else, we must define some fields. But we can always come back here later to add or refine stuff.
Fields are similar to the columns in a spreadsheet.
Our first field will serve as a unique identifier or key field for each record, sort of like the column that holds row numbers in a spreadsheet. Every table you create should probably have such a field. Click the Validation tab. This box lets you exert a lot of control over which data are legal in a given field. This can flag errors during data entry.