Android Question Which SDK version is the best for app out off Play Store

AddManifestText(
<uses-sdk android:minSdkVersion="18" android:targetSdkVersion="29"/>
<supports-screens android:largeScreens="true"
    android:normalScreens="true"
    android:smallScreens="true"
    android:anyDensity="true"/>)
SetApplicationAttribute(android:icon, "@drawable/icon")
SetApplicationAttribute(android:label, "$LABEL$")
CreateResourceFromFile(Macro, Themes.LightTheme)
SetActivityAttribute(main, android:windowSoftInputMode, adjustPan|stateHidden)
SetApplicationAttribute(android:requestLegacyExternalStorage,true)
SetApplicationAttribute(android:usesCleartextTraffic, "true")

AddApplicationText(
  <provider
  android:name="android.support.v4.content.FileProvider"
  android:authorities="$PACKAGE$.provider"
  android:exported="false"
  android:grantUriPermissions="true">
  <meta-data
  android:name="android.support.FILE_PROVIDER_PATHS"
  android:resource="@xml/provider_paths"/>
  </provider>
)
CreateResource(xml, provider_paths,
   <files-path name="name" path="shared" />
)

AddManifestText(<uses-permission
android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="18" />
)
SetApplicationAttribute(android:requestLegacyExternalStorage, true)