I recently shared my experience on the key elements I've learned starting a business. I was part of a founding team on my first one (which sold to Airbnb), and founder on the second, a marketing consultancy active within startup community.

Here's a link to the article: hope it helps and feel free to reach with questions.

https://www.benjamin-david.com/2017/08/ben-tuff-six-things-ive-learned-one-year-into-business/

Ben