Running and netball although I'm not good at netball.
Recommended read
The entire Bridgerton series by Julia Quinn.
Advice to past self
What is meant for you will find you. Don’t worry about the paths other people are on. If you believe in yourself there is nothing you can’t achieve.
A historical figure as imaginary friend
Wolfgang Amadeus Mozart would be my ideal imaginary friend because I played piano for many years so he would probably get the way I think and operate. The recent ambiguity surrounding his actual identity versus how he was portrayed would provide for extra entertainment.