Self employed or 9-5, where can I get clients or how do I find an employer?

I recently completed a course using CAD. I have used software throughout school as I had a friend who managed to get some software. So found the course really natural and I don’t have any problems using cad to produce building simulations, plans etc. But now what do I do. I don’t really have much professional experience. I did 1 week work experience whilst at school for a construction company but only briefly had any exposure to CAD. I have a portfolio but it’s just for personal projects, nothing professional. I don’t mind working for a company and don’t mind working for myself.