Android : In-app database or online database?

I'm relatively new in Android development and I'd like to know if it's possible or there's a way to create something like this: access an online database (where I can save, for example, a list of animals via ListView), and each animal has got a property (color, size, age...) which values can be modified. The user would be able to pick an animal of the list and then edit the value of each one of its properties via EditText (and, of course, save it in the database, via button or whatever).

I have never worked with databases, and I don't know if it's better to create something like this using an "online database" or an "in-app database" (I mean aspects of ease and speed of programming, memmory usage and data access for the user)

I ask this before start programming, since we all know what it's like to undo work that has taken to us many hours.

Any ideas would be of great help to guide me, any tutorial or videos too. Thank you!