It is well-known that engaging in regular high mental effort can help you to maintain good brain function in the long-run. What better way is there to get your brain excited than by engaging in the local community and giving back through volunteering? This is a good opportunity to go out of your comfort zone and develop your leadership and public speaking abilities further and to do so in a safe space. There are many public speaking organisations out there that can help you with the first steps in successfully engaging in speaking in public and improving your leadership.
I also recommend you to check out part 2 of the chat I had with the host on the Jesus Parada Show where I talk about my book "A Simple Guide to Public Speaking".
If you have got a presentation to prepare for next week and you would like to get a few pointers on how to go about improving your presentation delivery as a public speaker without joining a public speaking club, the book "A Simple Guide to Public Speaking" is perfect for you because it provides you with useful information in a succinct way that can help you to understand how you can explore the process of public speaking on your own and at your own pace.