Ratio home screen disappears after i press on the home button

I know this might sound like a noob question but i finally managed to install Ratio on my phone using the 3rd laptop. The installation went smoothly. Prior to this i was running nova launcher so now when i press on the home button, the ratio homescreen just disappears and the nova homescreen pops back up and I can’t figure out a way to bring the ratio homescreen back unless i open the BllocDeck app and fiddle around with the tile setup on the app. Is there a way to set Ratio as the permanent launcher? Like the android system allows you to choose 1 launcher forever or ‘just once’

Set it as the default launcher in settings…under apps… default apps… home apps

You will have to choose Ratio as your default launcher in App > Defaults > Launcher