To violate HIPAA, you need to be in possession of information that you obtained in a role with a covered entity (a health care provider or a business associate of a health care provider -- eg. a software firm that provides electronic medical records software or an insurance company.) Telling your own story is never a violation of HIPAA. Repeating information that was available to the public through the media is not a violation of HIPAA. You can say, "hearing that Colin Powell died of COVID despite having been vaccinated, piqued my interest in breakthrough infections and so I ...." and you have not broken the law.
If a person might be identifiable based on your description, and the information came to you while you were in a covered entity, it could be a violation. Even giving a date on the calendar is a violation. In other words, you might say that a 4 year old came to the emergency department having an asthma attack (not uncommon, happens all the time) but if you were to say that a 4 year old came to the emergency department on Halloween and you've included a variable that could identify that particular kid. (Your activities list is likely to include the name of the hospital where you were during that time frame which makes it all the more likely.)
All that said, even before HIPAA, physicians and those who aspire to the profession, should keep private what is said to them in private and respect the privacy of those who confide in them.
It might be hard to imagine but I do know of an adcom member who recognized that the inspiration for one applicant was the adcom member's own young son who had a disability and used some very distinctive adaptive equipment and who was a student at a school where the applicant had volunteered. The adcom member recused herself from review of the application but you never know what you write might be read by someone who knows the person you are writing about (fortunately for one applicant who mentioned my brother by name, the report of the medical care received was very complementary and, of course, writing about your own medical care is not a violation of HIPAA.)