As with most things, the more you do it, the easier it gets.
When I started, out, I hated doing it, and panicked so hard I pretty much blanked out and rapidly babbled thru my presentations, assuming I didn't chicken out and avoid it altogether.
Now I love doing them, and am pretty good at it. Had to learn how to make a proper script to follow, that made it easier. Practicing the presentation endlessly before delivering it helped a lot, too. Cold readings tend to be a little choppy, so its beneficial to rehearse the presentation a buncha times beforehand.