I have been "promoted" from a software developer position to a project management role in a solo little project (about 200h). All the development work will be done by me, and also I'll talk to the client, document the project, make the estimates, etc.

I've read the that the worst mistake new PM make is they don't manage project risks. The problem is that I don't know where start. How to detect the risks? What I have to do with them? Any example?