Toastmasters International has a series of podcasts about public speaking which are available to the public at this location: https://www.dowellwebtools.com/tools/bg/Bo/tmpodcast
You can review all the titles and choose the ones that appeal to you most, or you can work your way through them one at a time. No matter which you choose, you will benefit from viewing them.
To your speaking success.
Fran Watson