I have a masters in biology (fisheries) and wish to start a business of my own

I have a masters in biology (fisheries) and wish to start a business of my own. I am short of funds and have not done good in my previous jobs as well. I am trying to read and gain knowledge from books. I would like to know if i can get any suggestions to convert my dream of establishing a business of my own starting with limited funds into reality. business fields thought of to proceed are as follows … education and coaching , freelance lecturer in biology and fish culture and last but most important becoming a successful writer or novelist. Kindly guide me if possible.