My T only really starts the discussion if I'm not talking. And even then, she'll bring something up and then say, "we don't have to talk about it if you don't want to because I brought it up". T would immediately stop a conversation if I changed it and wanted to talk about something different.

Sometimes I don't know how to start a conversation but I know I want to talk about a certain topic. I'll be upfront and say I don't know where to start and then she usually asks a very simple question that gets the conversation rolling.

My personal opinion is that a T should take your lead and let you determine the general direction of the conversation. They will of course guide it but should follow your lead if you decide to take it. My T won't choose a topic for me even if I tell her to (I tried once), instead we did an exercise that helped us find something to discuss.