I’m pretty surprised how much newbie guys reject ardupilot for Inav due to installation process.
With inav it is really simple. Just press dfu button, connect configurator and choose correct board from drop down.
It’s completely different what we have in ardupilot word.
You need: download firmware from website.
Take (surprise!!! ) inav configurator. Flash it. Take gcs software and so on…
So many new guys go to inav or betaflight.