The guy who did the install at a family member of mine was not a certified electrician, he got a guy to certify the job, he has some trade theory and knows everything there is to know about wires and has plenty experience.
He had done plenty electrical work for us before but has never installed solar panels before, we all convinced ourselves there was nothing to it, watched some videos on YouTube and up we went onto the roof, he is a handy guy and got the tiles of in no time, we screwed on the hooks and put on the rails.
We were not available during the week so he got his own guy and when we came back from work the panels were on the roof. From there it was his turf, got everything wired up, the inverter settings is not his thing so that was left to us, we figured out everything and the system has been working ever since.
But I do get the paranoia if you are not technically inclined, it's much better to leave things to professionals.