I applaud your ambition to wanting to start something new and build it to make a living. Have started two digital marketing agencies before I can attest to some of the challenges and rewards. There are a few places you can look for education like MarketingProfs and Content Marketing World as well as eMarketer. Additionally, you will learn by doing and also recommend you get a mentor who can help you along the way. Best of luck in your journey and let me know if I can help in any other way.