My advice is flip a coin. If you regret the way it landed, then go with your gut.
Many many external circumstances are outside of your control, but will affect the outcome, and you have to be OK with that.
I try to keep the meetings small, especially when we're doing product design.
I try to work the hardest I can without burning myself out.
You need to just get started. If you never get started, you'll never be successful.
Surround yourself with people who do what you want to do, and eventually you’ll wake up to find yourself doing the same.