I'm 27 years old. I worked for a small residential heating and air company for 7 years. My boss promised me the moon for 4 of those 7 years and never delivered. My boss knew his stuff, but he wasn't the most honest and I didn't like the way he did certain things. But I kept my mouth shut, showed up to work on time, and handled my business. When I decided to go back to school, I gave him a months notice. Informing him that I was quitting and going back to school. He was furious. And made that last month miserable for me. I didn't deserve it, but I still kept my mouth shut because I didn't want to burn any bridges. But in his eyes, me going back to school was burning a bridge.
But I'm almost done with school, and I want to start my own company. Just me, my tools, and my van.
How should I go about doing this? Should I work for someone else for a little while and do some side work?
I know it won't be easy.....but I'm willing to give it my all.

Thanks in advance, guys!