Fetch data from other Screen

Afer logging in I want my user to proceed to other screen to MANAGE ACCOUNT . But I do not know how

Please search the community, there are many topics about this.

Also

Use different screens wisely

If you decided to use different screens, then you should switch them correctly, else you will run out of memory after a while...      
The recommended method of switching screens in App Inventor
(Thanks Taifun)
 
Also see demo: multiscreen.aia
 

will it work with Firebase??

Will what work with Firebase?

If you have data stored in Firebase, then you need to call that data back as you need it on which ever screen you are on.