Presenting well is an art that is characterised by preparation, and lots of it. Here’s what can happen if you scrimp on that preparation.
I find that the “rule of three” applies well. It says that, at a minimum, you need three times as long as you present for rehearsal, and three times that for preparation.
That means that for every hour you have to present, you need three hours of rehearsal, and nine hours of preparation, where you collect your material and organise your message.
And that, of course, is the minimum.
Spend too little in prep and rehearsal? This might be the outcome.