First action: write your main point in one sentence, then say it aloud once before adding anything.
Finished example: Good morning. One idea today: plan before speaking. Planning may steady your nerves. Try it tomorrow. Breathe slowly, with a longer exhale, and step forward to begin.
Write the speech down first. Preparation is one of the best ways to give an effective presentation, so draft the shape on paper: an opening, two or three main points, and a summary close. Start by writing your main point in one sentence, then say it aloud twice before adding anything. Many courses teach this same introduction, body, conclusion sequence, often with three to five main points.
Edit for the audience. Early on, answer the listener's unspoken question, what's in it for me, ideally in the first minute. Show them why they are listening to you before you move into your main content.
Rehearse with a timer so pacing becomes real, not guessed. Practice frequently, since short sessions done often beat one long cram.
Rehearse with people, not mirrors. A mirror tempts you to judge appearance; listeners tell you whether the words landed. Ask one friend for a single note, then revise once.
Record one run-through and play it back with that note in mind. Recording plus external feedback is often how speaking skills improve; both matter more than repeating lines alone.