To do this, you need to win any season of the World Series championship.
There's 6 weekends, 4 races in each.
You are almost definitely able to get by with this by doing the 1st and 3rd race of every weekend, skipping all other events including qualifying, as it's easy enough to just force yourself in first recklessly in the first 30 seconds.
Watch the leaderboard, if someone passes you or gets too close to passing, you may have to do some of the second or fourth races.