Configure Network Ubiquiti Cloud Managed Switches

I need someone who can work with me quickly on configuring Ubiquiti Access Points and Network Switches.

Basically.

Dell N2048 Switch is the main switch where all the below devices are connected.

Ground Floor
1 x Network Switch Model : USW-PRO-24 PoE
2 x Access Points Model : UAP-nanoHD
2 x Access Points Model : UAP-nanoHD

1st Floor
4 x Access Points
1 x Model : UAP AC PRO
3 x Model : UAP AC SHD x 3 Numbers

2nd Floor
1 x Switch Model : USQ-PRO-24 PoE
2 x Access Points Model : UAP-nanoHD

3rd Floor
1 x Switch Model : USW-Pro-24-POE
2 x Access Points Model : UAP-nanoHD
3 x Access Points Model : UAP-nanoHD

What we need to configure is

Each floor is isolated by its Traffic.
For example Floor 1 has it switch so all device connected to that switch are isolated to Floor 1
But still Floor 1,2,3 shares the internet from DELL Switch Dell N2048

Second Floor has Dell N2048 switch which is connected to a firewall.
We need to configure Ground floor Floor 1