The thing is, try to implement it in your daily routine, it grows in no time. Now you know what you can do now but just experiment and get feedback from your friends and here. Feedback loop and journaling is important.
laying on the back is a different ball park.
But here a guide to help you understanding it and for your specific needs.
A Guide about burping That Supports You Like a Good Friend – Step by Step, With Emotional Care and Everyday Integration
1. Give Yourself Time and Create a Safe Space:
Meta-Orientation: Before you start, ask yourself: “How am I feeling right now, and what do I need to feel safe and at ease?” Choose a comfortable environment—maybe a quiet room, a soft blanket, a pillow, and calming music. This preparation is not a luxury; it’s your personal starting point, ensuring that you can focus on yourself with kindness and curiosity.
2. Connect With Your Body:
Emotional Level: Imagine you’re getting to know your inner self like a friendly neighbor. Place your hand gently on your belly, close your eyes for a moment, and notice how your abdomen rises and falls as you breathe. Ask yourself: “What am I feeling in my body right now?” This pause is important—it shows your body you’re listening and not just expecting it to perform on demand.
3. First Step: Practice Swallowing Air in an Upright Position
Practical Step: Begin by sitting or standing upright. Try to swallow a small amount of air as if you were taking a tiny sip of warm tea—just without any liquid. Take it slowly. Notice if you start to feel a light pressure building.
Emotional Anchor: If you feel uncertain, remember when you learned how to tie a shoelace. It took patience and gentleness. This is similar—you’re exploring something new, one small step at a time.
4. Bonus Step: Gently “Sucking In” Air
Second Stage: Once you’ve grown comfortable swallowing air, experiment with a gentle “sucking in” action, like drawing in a small pocket of air behind your teeth before swallowing. This subtle adjustment can help you fine-tune how you control and direct the air.
Emotional Orientation: Treat this bonus step as an invitation rather than a challenge. If it feels strange at first, that’s completely natural. You’re discovering your unique rhythm, giving yourself permission to progress at your own pace.
5. Changing Position: Transition to Lying on Your Back
Meta-Orientation: When you’re ready, lie down on your back. Notice how your body’s sensations shift. Does your abdomen feel different as you try swallowing or sucking in air in this position? Imagine your stomach as a small room where the air now settles differently.
Emotional Level: Allow yourself to acknowledge any discomfort or unfamiliar feelings. Perhaps a thought arises, “This feels odd.” Observe it and let it pass. You’re cultivating an understanding of how your body responds to new positions and subtle techniques.
6. Integrating Practice Into Your Daily Life:
Practical Integration: Consider when you can find a few calm moments each day. Maybe before bedtime, after a yoga session, or while your partner handles the dishes. The goal is to seamlessly weave brief practice sessions into your everyday routine rather than treating them as a separate, demanding task.
Emotional Anchor: View each short session as a friendly check-in with yourself. Notice what’s new compared to yesterday. Maybe the swallowing and gentle “sucking in” feel easier, or maybe they don’t—and that’s okay. Consistency and understanding are what matter most.
7. Be Kind to Yourself and Celebrate Small Victories:
Meta-Orientation: Remember that progress is not a straight line but a dance of small steps forward and backward. Every practice session you try—whether upright, on your back, or incorporating the “sucking in” technique—helps you learn more about your body’s capabilities.
Emotional Level: Acknowledge even the tiniest improvements. If you manage the first proper swallow, or notice that your body feels more relaxed during the “sucking in” step, give yourself credit: “Well done, you’re learning!” This kind self-talk encourages you to keep going and pat yourself on your shoulder for that achievement. 
It’s also usable for other good shit.