You overcome the fear of public speaking through preparation, practice, and starting small, not by waiting to magically feel confident. Almost everyone fears it at first; confidence is built by speaking repeatedly, and good preparation removes most of the fear.
Prepare thoroughly. A huge part of the fear is worrying you will forget or fumble. Knowing your content well, and practising it out loud several times, gives you a solid base and dramatically reduces the nerves.
Practise out loud, not just in your head. Rehearse your speech or presentation aloud, ideally in front of a mirror, a friend, or your phone camera. The more you practise actually speaking, the less frightening the real moment feels.
Start small and build up. You do not have to address a hall first. Begin by speaking up in class, answering a question, or presenting to a small group. Each small success makes the next step easier.
Shift focus from yourself to your message. Fear grows when you obsess over how you look. Focus instead on getting your message across to the audience. Caring about the content more than your image calms the nerves.
Example: A Class 11 student in Chandigarh who dreaded presentations practised aloud at home, started by answering one question in class daily, and focused on her topic rather than her nerves. By year-end she volunteered to present, something she once thought impossible.
One practical tip: Accept that some nervousness is normal, even great speakers feel it. The goal is not zero fear, but speaking well despite it. Each time you speak it gets easier, so take every small chance to practise.