You get better at this by doing it badly first.
Spin a topic. Talk for sixty seconds. No script, no notes, no second take. Nobody is listening, which is exactly why it works.
Pull from
Spin, then talk for a minute. Do not plan it. The point is the part where you have not worked out what you think yet.
1:00
This page is free and always will be. It gives you the two things that are genuinely hard to arrange on your own: a topic you did not choose, and a clock.
What it cannot do is tell you what you actually sounded like. That part is here now: record the minute, and get back the specific things you did, quoted from your own transcript, one at a time.
Record a minute