I may not have been clear enough in the OP. Yes, I want to learn the software and not general presentation skills.

I usually know what I need in a document, I just want to spend less time putting it together.

To edit text files quickly I learnt vim commands, I'd like to find something similar to take the sting out of working with PP. Keyboard driven workflows, advanced features etc.

Right now I am doing a lot of clicking, a lot of inserting textboxes, changing text formats and dragging things around on slides. I would like to type and hit a few shortcuts as I go to arrange things.

I appreciate people suggesting rules for numbers of slides and tips for preparing to speak but that isn't what the problem is.