I am a final year PhD in a STEM field. My PhD research field is fairly stagnant with less scope of future growth. I had chosen this topic because I was interested in the field during my masters and did not investigate seriously about the future prospects in the field.
Now I totally regret it. I managed to publish just 1 publication during my 5 years of PhD, and am planning to submit 2 more. There was no scope getting an internship in my research area and while searching for industrial positions, I have found that such positions are also nonexistent. Lot of red flags for a research topic.
I wish I could have been more serious while investigating for PhD positions. I could have done many things differently. I want to be in academia. And I am looking to switching to a different field during my postdoc to make my profile better. How should I approach a prospective professor if I have nothing to show competency in the new field? Is it even possible, if there's an overlap of just a simulation technique between my work during PhD and the field I want to work in?