Doubt myself

It seems intomidating to start creating content for me to share with my audience/clients. I think of my work day and what I “should” do and I get anxious. I know I need to coach on a topic, and there are so many, but which one, none seem like I know what to say, how to start, and I dont have the energy – whats the point anyway since I forget important things all the time too. Like I think “Ive lost it” as in the “good idea”, or the “ahas” I need to share often. Help!