This achievement requires you to win your first championship in career mode.
You can approach this however you want, but you should start in the 6th tier to work towards the following achievement:
The Zero to Hero achievement in Project CARS 2 worth 279 pointsComplete the Zero to Hero lifetime goal (start in Tier 6 and go on to win a Tier 1 Championship) There are three championships you can select:
Formula Rookie
Kart One
Ginetta Junior
You can do the long or the short version of these (and all championships) by hitting
. To make this even easier, you can go to Progress and Settings > Career Settings on the Career menu and move the Opponent Difficulty and Opponent Aggression all the way to 0.
With these settings, you should have no issue completing the races in this championship and you'll unlock this on the loading screen after you win the championship.