You need to just get started. If you never get started, you'll never be successful.
My advice is flip a coin. If you regret the way it landed, then go with your gut.
My entire career has been pivoting from company to company. Some people call it lack of planning or direction, I call it flexibility and good improvisational skills.
I find it hard to manage somebody's work unless I have an intimate knowledge of how to do it myself.
I try to work the hardest I can without burning myself out.
Start-ups don't die, they commit suicide.