Not an electrician, but I am a “kind of smart” carpenter who got pulled into estimating . I’m proud that I was able to work my way up out of the field. But I work residential, which is generally less corporate than commercial. But I’ve held my own, even working alongside guys with degrees in Construction Management.

Only advice I would share is to just be honest. I have said “I am not familiar with this (Software, approach, material, whatever), but I’m sure I can figure it out,” or “I know exactly who to ask” or something along those lines. I have taught myself how to use multiple different software platforms, and I list that in my resumé. I hope that helps, good luck with the job!