I’ve put together a bunch of short AiM videos to help people out with Race Studio 3 at https://racestudio3.com/. There is a host of them from me, AiM, and James Colburn. I have some more to add from KartSpeed Solutions soon too. I think the website might change some, but it’s time to put it out there and see what people think.
If you like written documentation better, check out RaceStudio 3 - User Manual — RaceStudio3 latest documentation were there is the full help file for RS3 written by Emiliano, the head software engineer.
Let me know if you want videos on something specific and I’m happy to make them.