Google Play is the largest source to download Android games and apps in MuMu player. Therefore it is recommended to sign in on first launch.
Whatever you choice, the emulator will start after this. You can start using it just like any Android emulator for desktop PC.
How to use MeMu Emulator?
Using the program is as easy as any other Android PC emulator like BlueStacks, SmartGaGa, Gameloop (Tencent Gaminng Buddy), Nox Player, etc.
https://lisanilssonart.com/mumu-app-player/