Your creation and edition forms can also adapt to fit your need.
To customize a collection's creation form, go to it (1):
Then enable the Layout Editor mode (2), click on the cog icon (3). You can then show/hide certain fields (4) and reorder them (5). Make you only hide optional fields, otherwise your database will reject the new record.
To customize a record's edition form, go to it:
Then enable the Layout Editor mode:
From there, click on the cog icon (1) to show the list of fields and hide them (2) or reorder them (3):