It’s your therapy and you should start it whatever way you like!
Personally I think I’d find writing things like that down very non personal, in early days I’d want to see if there’s any connection with the therapist so I’d probably want to actually chat and communicate those things.
I’ve used writing to tell my T difficult things but that was after I knew we connected.
In saying that, wouldn’t it be handy for Ts to have a little timeline of events at hand when talking to clients. Maybe they make them anyway? Who knows
Best of luck with starting again