Learning to do business

I am learning many things for the last few days by reading a book called "The Business Side of Creativity". I must tell you, I feel like I am back in college. I am learning about selling & marketing, taxes and many other things that are related to having your own creativity business. I love my profession as a graphic designer, but it is always challenging for me to tackle business side of this profession. Sometimes, I wish that I should've minored in business administration while I was in college. Trying to learn business on my own is very hard especially when I have a three year old running around me...... Anyway, I am very determined to learn everything about business and hoping to be very successful in my freelance business in the future. I don't know how long it will take me to achieve my goals, but I will keep trying to do my best. Wish me luck everyone! Thank you!