Well there's noobs, and then there's noobs, so it is a bit hard to give advice.
But my opinion is you should definitely use manual gears. Traction control and ABS are fine to use (even real cars, both race and road use these). I would advise you to not bother with the racing line indicator. In my opinion you are better off to just stick with one track and learn it, rather than relying on an indicator to tell you where to go (which is what noobs to when they jump from track to track and never really get to know it). In the end it is just distracting. It only takes a few laps to learn the track (Nordschleife excluded), and you kind of get a racing line indicator in the form of the track rubber marks. Also, if you aren't looking at the line indicator you can focus on looking at brake markers to get your braking really consistent.
Also, I would advise you concentrate on getting your lines right and then the speed will come, rather than trying to drive fast first time out. As my music teacher used to say if you practice something wrong all that happens is you get very proficient at doing it wrong.
Good luck!