It’s actually not that hard. Microinverters have taken a lot of the danger out of it. Every one or two panels has an inverter, they can be individually controlled and tie together with 120 volt AC wiring, so you avoid the issue of 100+ volt DC strings that can’t be turned off. And on the physical side, there are now rack systems that install very easily and look good. Designing and installing the system isn’t hard. Just look up the documentation from Enphase or someone similar, you just need panels, micro inverters, a combiner panel, and maybe one of their computer management units. There’s other manufacturers too but the concept is the same. Installing the solar is the easy part. Getting permits is the hard part. Municipalities throw up a ton of red tape and utilities throw up even more for any sort of grid connected system. So what would be a basic concept that a technician level person could design, ends up being this complicated thing that needs engineering sign-offs and stamped plans that have to be approved by the town and the power company and inspected 18 different ways. This leads a lot of people to do off-grid systems, that is, set up your own solar panels and batteries, and run some portion of your house off at using extension cords rather than hardwired. If you’re just putting panels on the ground or on your deck and running extension cords, no need for permits.