I am a first time CEO too. I have startup experience and even experience as a business owner. However, being CEO of a startup with outside investors is a whole new experience.
I am lucky to have great investors, a strong and friendly board, a few great employees, but like you said, I often am doing things I have no idea how to do.
My one tip to other first-time CEOs: over communicate. I send out a weekly(ish) internal email to my team, board, investors, and advisors. Everyone gets the same email, so there is no bullshitting. The investors love it.
I am lucky to have great investors, a strong and friendly board, a few great employees, but like you said, I often am doing things I have no idea how to do.
My one tip to other first-time CEOs: over communicate. I send out a weekly(ish) internal email to my team, board, investors, and advisors. Everyone gets the same email, so there is no bullshitting. The investors love it.