How to know your Android configuration?

I’m trying to download Instagram via third-party provider which resembles Google Play Store, allows users to download application using APK files modification.
As soon as i started the download process, did i receive announcement to pick out compatible variant for my Android. This includes DPI, supported ABIS, Android Version.
I have stalked my Android device but i can’t find these information.
Can somebody help me with this ? is there any app or somewhere in our phone help to recognize these configurations?

Settings/About Phone (or similar, on your Android device). Any reason you are downloading apps from an untrusted source?