How to get random data from Google Firebase in Android Studio

I am trying to get random data from firebase, but I am unsure how. I want to get random data in the following two ways:

1. when the app launches, it will pull any random quote from the list of 2000 quotes (maybe in the future the number can get upto 10000+ quotes).

2. now if the user clicks the button (random button) I want a new random data to be shown every time the user clicks the button

The database is like this

I didn't implement a method for getting random data from Firebase, because I don't know how to do it.

I tried to implement some answers, but didn't know how. Here is the code I tried, but I wasn't sure how to use it.

 Random random = new Random();
        int position = random.nextInt(quotes_list.size());

HomeActivity

public class HomeActivity extends AppCompatActivity implements View.OnClickListener {
    TextView countTxt, quotesTxt;
    ImageView previousBtn, randomBtn, shareBtn, copyBtn, nextBtn;
    List<String> quotes_list;
    DatabaseReference databaseReference;
    Model model;
    int position = 0;
    private AdView mAdView;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.home_activity);
        countTxt = findViewById(R.id.countText);
        quotesTxt = findViewById(R.id.quotesTextView);
        previousBtn = findViewById(R.id.backBtn);
        randomBtn = findViewById(R.id.randomBtn);
        shareBtn = findViewById(R.id.shareBtn);
        copyBtn = findViewById(R.id.copyBtn);
        nextBtn = findViewById(R.id.nextBtn);


        previousBtn.setOnClickListener(this);
        randomBtn.setOnClickListener(this);
        shareBtn.setOnClickListener(this);
        copyBtn.setOnClickListener(this);
        nextBtn.setOnClickListener(this);
        Random random = new Random();
        int position = random.nextInt(quotes_list.size());


        databaseReference = FirebaseDatabase.getInstance().getReference("Quotes");
        model = new Model();
        quotes_list = new ArrayList<>();
        databaseReference.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull @org.jetbrains.annotations.NotNull DataSnapshot snapshot) {
                for (DataSnapshot dataSnapshot1 : snapshot.getChildren()) {
                    model = dataSnapshot1.getValue(Model.class);
                    if (model != null) {
                        quotes_list.add(model.getTitle());

                    }
                }
                quotesTxt.setText(quotes_list.get(position));
                countTxt.setText(position + "/" + quotes_list.size());

            }

            @Override
            public void onCancelled(@NonNull @org.jetbrains.annotations.NotNull DatabaseError error) {
                Toast.makeText(HomeActivity.this, "Error", Toast.LENGTH_SHORT).show();

            }
        });

        // Ads

        MobileAds.initialize(this, new OnInitializationCompleteListener() {
            @Override
            public void onInitializationComplete(InitializationStatus initializationStatus) {
            }
        });

        mAdView = findViewById(R.id.adView);
        AdRequest adRequest = new AdRequest.Builder().build();
        mAdView.loadAd(adRequest);

    }

    @Override
    public void onClick(View view) {

        switch (view.getId()) {
            case R.id.backBtn:
                back();
                break;
            case R.id.randomBtn:
                //this where i want to implement the random data when user click this button
                break;
            case R.id.copyBtn:
                copy();
                break;
            case R.id.shareBtn:
                share();
                break;
            case R.id.nextBtn:
                next();
                break;
        }

    }

    private void back() {
        if (position > 0) {
            position = (position - 1) % quotes_list.size();
            quotesTxt.setText(quotes_list.get(position));
            countTxt.setText(position + "/" + quotes_list.size());
        }
    }

    private void next() {
        position = (position + 1) % quotes_list.size();
        quotesTxt.setText(quotes_list.get(position));
        countTxt.setText(position + "/" + quotes_list.size());
    }

    private void copy() {
        ClipboardManager clipboardManager = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
        ClipData clipData = ClipData.newPlainText("text", quotesTxt.getText());
        if (clipboardManager != null) {
            clipboardManager.setPrimaryClip(clipData);
        }
        Toast.makeText(getApplicationContext(), "Copied", Toast.LENGTH_SHORT).show();
    }

    private void share() {
        Intent intent = new Intent(Intent.ACTION_SEND);
        intent.setType("text/plain");
        intent.putExtra(Intent.EXTRA_TEXT, quotesTxt.getText());
        startActivity(Intent.createChooser(intent, "Share to"));
    }

}