Forza Motorsport 6: Apex

You do not need to race against any drivatars or opponents to get this achievement

From the Main Menu:

Free Play

Track > Top Gear - East Circuit (day)
Car > Any (I used the Lamborghini Huracan 610-4)
Game Options > Max Drivatars - 0, Laps - 1
Difficulty > Whatever you are comfortable with, but turn 'Suggested Line' OFF

Start the race in cockpit or hood view. If you use a different view, switch to either of the two and restart the race. Finish the race and the achievement will pop when you go back to the menu.

You must go into Assists before the race and make sure the racing line is set to off. You cannot have it on Full or Braking Only. It must be off. You can use rewinds as much as you want and you can do this in Free Play against only one opponent. Choose whichever car and whichever track you're most comfortable with. Set the Drivatar difficulty to New Racer as well to make it even easier.

If you normally use another view than cockpit or hood, you can start the race, cycle to cockpit or hood view, and then pause and restart and then win the race and the achievement will pop.

Go onto the settings and then hud, then change the camera view to cockpit. Then go onto free play and set up a race, I would suggest the third top gear track as it's the shortest and set the drivitars to 0 as the achievement will still unlock. Set the laps to one and on the assists make sure suggested line is turned off, then start the race.

Finish the one short lap and then the achievement is yours :)