Android studio: is possible to have hotspot with internet access? (Local only hotspot)

See more:

Java

Android

I'm new to Android Studio and I'm using the functionality of Local Only Hotspot to turn on and off programmatically the hotspot (found this two post for reference: How to turn on/off wifi hotspot programmatically in Android 8.0 (Oreo);)How to turn on Wifi-Hotspot programmatically on Android >= 7.1 (including sharing the internet access)?

private void turnOnHotspot() {
        wifiManager.startLocalOnlyHotspot(new 
          WifiManager.LocalOnlyHotspotCallback() 
         {
            @Override
            public void onStarted(WifiManager.LocalOnlyHotspotReservation reservation) {
                super.onStarted(reservation);
                hotspotReservation = reservation;
                String key = hotspotReservation.getWifiConfiguration().preSharedKey;
                String ussid = hotspotReservation.getWifiConfiguration().SSID;
                System.out.println("KEY: "+ key);
                System.out.println("USSID: "+ ussid);
                currentConfig = hotspotReservation.getWifiConfiguration();
                System.out.println("STARTED THE HOTSPOT");
            }
            @Override
            public void onStopped() {
                super.onStopped();
                System.out.println("STOPPED THE HOTSPOT");
            }

            @Override
            public void onFailed(int reason) {
                super.onFailed(reason);
                System.out.println("FAILED THE HOTSPOT");
            }
        }, new Handler());
    }
    private void turnOffHotspot() {
        active = false;
        if (hotspotReservation != null) {
            hotspotReservation.close();
            System.out.println("CLOSE HOTSPOT");
        }
    }

What I have tried:

But from what I gather from other older posts and documentation, this method gives a local network without internet access and a random SSID and Password that cannot be personalised.
I need to connect only one device to this hotspot and to share the mobile data (to have internet access, but I didn't find anything that could have help me. Is there another alternative? Or P2P is the better solution?