I am a computational materials science researcher. I model additive manufacturing process using continuum modeling methods. Almost everyone who works in my field are part experimentalists and partly into computational modeling. Though with an experimental master's background, my PhD research was completely computational and not theoretically intensive (it was very straightforward if one knows the computational modeling tools and a bit of coding beforehand, more like clicking the right button and developing scripts to do some analysis).
I feel that I would have gotten better job prospects if I had an experimentalist and computational profile. Almost at the end of my PhD (about to defend), I have a postdoc offer with my current PhD advisor, which I will take because I don't want to move to a different place with covid-19 in other locations. But I dread job prospects in my limited experience and expertise. How to address the fact that I might have chosen wrong research area?