I installed android studio to make the app made with unity into an apk file.
I want to install the SDK next, but I don't know which version to choose.

Since the android version of my smartphone is 10, I will install it before and after that.

I don't want to install a lower version because I want to reduce the capacity, but in that case, I am worried that there may be an application that can not be used by older users of the Android version.

Is it okay for users to not install an older version of the SDK?