If you cannot install the game, please note you need about three times the APK size free storage to install it, and to allow it to unpack itself when you first run it.

If you still cannot get past the load screen, or are seeing instability and frequent crashes while playing, free up RAM(*). Go into Settings->Device Care->Memory, and close any programs that are taking up a lot of memory. If you cannot free up enough (and honestly, it's a bit like playing whack-a-mole), consider finding a tool in the Play Store that helps you free up more.

Considerations on using RAM+ for devices that support it. Note that it's a neat way to add additional *virtual* RAM, but that RAM is actually repurposed storage, and that means it's dead slow. On the one hand, it might be just what you need to get the game running, on the other hand, it might just be what is causing lagging and glitching in your playthrough.