I know that someone is going to laugh, but Project Cars 2 has some pretty interesting elements for learning.
It has a very clear racing line guide, which changes colour according to your speed.
It allows you to view the fastest laps of each player for each car, which lets you replay their lap to learn their lines and accelerating/braking points.
It also allows you do download their setups to try.
The only thing I have found about PC2 is that it seems to be based entirely on drifting. Which ever car I try, from Karts to open wheelers, they have the same 'win' criteria; you have to kick the back end out like a rally car to drift through corners.
It's not like any kart I've driven, but I've never driven an open-wheeler.
It doesn't help you learn how to set up a car, but there's a lot more going on there, and it is desperately pretty. The weather effects are superb.
I like Assetto Corsa, when it works, as there are a million mods for it for free.
RF2 has to be the daddy for serious sim racing, but again there are a million mods for it. I've not played the Studio 397 version, just the old ISI, but ran that for a decade (ish) with no worries.
Recently I dusted off Race07 - pretty basic by today's standards, but very forgiving for learners. Lots of famous tracks, lots of mods. Retro Metro. Race a Radical around the Nurburgring. Top stuff.
Let the mocking begin.