(I am not an officer (except at the volunteer/anyone can do it Club level), employee or stockholder of Toastmasters. Just a very satisfied member since 2014. I get absolutely nothing out of anyone joining.)
This is a Toastmasters Ice Breaker speech. 4-6 minutes about yourself. (Which is shorter than most other Toastmasters speeches.) I've given 3. First speech for every Toastmaster. Consider visiting a club. Almost all enjoy having guests, and all are virtual now (a year ago, that was against the rules, now it is required!), and since they're worldwide you can certainly find one to fit your schedule. One of the best things I've done in a long time was join. Worthwhile even if you don't have to actually give speeches often.
Most Toastmasters speeches are designed to work on specific skills - vocal variety, gestures, presentation software, humor, research, etc. There are a set of different "Pathways Paths" that have different types of speeches. But every Path, and also the former Competent Communicator program, starts with an Ice Breaker speech. A speech about yourself. There are many different ways of giving this speech, and since the first Ice Breaker is your first ever Toastmasters speech, pretty much anything goes! There are a bunch of different styles:
- Personal History/Timeline
- Focus on one specific aspect of your life - career or a particular hobby or interest
- Why I decided to go Toastmasters - a bit of a cliche, but sometimes actually interesting
- Family History
Obviously this speech, like any other, might be tailored a bit to particular situations. Your family history probably won't be a good choice for your current situation. But maybe the story of how/why you got interested in your academic field. Or perhaps a story about how some previous teachers influenced your life and motivated you to go into academia. They may well have left it open-ended specifically to see what different people can come up with - if they wanted to know specific facts they would just give you another questionnaire.
Try Toastmasters. Even if you only go for a little while, you may get some inspiration and/or useful advice. If you do stick around and join, you may find the benefits in learning how to be a better speaker really pay off in the long run, whether as a teacher or as a researcher.