Thanks for your reply.
I can create the UI perfectly just how I want it but no matter what I do, I cant connect Firebase to create a registration/login system.
I have previously used Bubble and Adalo which use standard table databases, but due to costs I moved to Flipabit, yet the backend/database issue is causing a problem so I may have to look to a different program
What I am building must have a registation and a login then multiple linked tables which users have restricted access. Google Sheets is not secure enough and I find Firebase is complicated compared to standard databases