Setting up firebase (cloud firestore)

Hi, I previously used firebase in one of my projects a long time ago. But now in firebase, it has collections, documents, and fields. How to use kodular with this new ‘cloud firestore’? Can I create new documents in firebase within the app?

P.S : I am trying to make a sign up form, and want collect email id, name, etc from each user.
(Airtable IS NOT working, and it seems that there is no way to do this with google spreadsheets neatly.)

There are several tutorials/open-source AIA/Guides for the same, please search community first for similar topics and info