Well most top teams in top leagues uses pretty much same setups or taken from World records. Actually only a few teams are trying to develop a new and faster set than current wr one but rest of the top leagues teams is driving same wr setup and diffrence between really top LFS drivers is not bigger than 0.3s from wr. It also depends so much from a driver motivation - some are taking it really seriously some are just racing for having fun and what car/track they prefer.
I'm not particularly fast in the fwd cars and it's the day after new years eve at 6 in the morning but I just felt like doing some laps.
Never mind the first few laps, took me a while to get used to the car/set, last 3 laps should be a reasonable benchmark to aim for. The default set got no camber and is generally outdated, so I would rather not try and go online with it but if you're just learning the car and track and got no real experience in simracing it's probably good to get yourself a set you feel comfortable with and just learn the track/brakepoints/lines until you are up to around 1 second of a good time. After that it may be worth checking out sets specially made for the track since they usually got a proper gearing and suspension to get the most out of a lap.
Sites/Places to get sets got linked already so I wont do that again, rule of thumb should always be "slow in fast out", don't overdrive the car be smooth with the throttle/steering input and everything else will come with more experience.
edit: great it looks like you can't save replays from the training lessons anymore, I thought that was possible at some point. Re-recorded the whole thing in single player with hardtrack setup (should be the same as the one in the testdrive)