I don’t know if you know but miui 11 is comming soon. I don’t know when on mi9 but on mi 9t started rolling out. It should be better than miui 10.

There are a few features that you should try:

– Full screen display.(im pretty sure you already did)

– Settings>Notification & status bar – show connection speed. (Allows you to see your connection speed of the internet – up left corner next to clock)

– Go in any folder and click on his name. Then you will see promoted apps may be turned on so turn it off and you wont see ads in the folder.

– Make sure you create an mi account. Its useful.

– Settings > Home screen & recents – show memory status on. (Allows you to see your ram memory status it may be already turned on)

-Settings > Home screen & recents – home screen layout. (Change it if you want to 5×6 and you will be able to see more apps in one screen)

– if you long press the display you will find wallpaper, widgets and setting where you can find pretty cool stuff like trasition effect.

Also if you go to settings>about phone and tap 10 times miui version you will be able to developer options which you may find very useful stuff there.

Let me know if you found something useful i hope you did. Enjoy your new phone!