Don’t pick your partner in crime unless he knows the business. Even if he is your best pal and wants to bet his life on you (between that’s a lie).
Be selfish. Its you dream and your passion. You need someone who can share it, and without a deeper understanding of it, he can’t.
Don’t get tempted. It has to be a 360 degree match. Start with the question, “I don’t want him to join me because:” and if you don’t have an answer, you found your partner.