Don’t underestimate the value of just describing who you are and how you ended up in your current position.

I had several conversations with 'specialists' after my 80k advising call, and personally found the seemingly generic 'tell me about your career path' information surprisingly helpful! I found that people usually ended up sharing little tidbits of information that helped clarify the landscape of different fields, who is entering them and by what channels, and what alternative pathways might look like.
 

I dug up an old Open Phil newsletter that you might be interested in.

It's ~4-5 years old so some things might have changed since then, but it addresses some of the questions you pose here quite directly.