A guide probably isn't needed for this, you just need to win 80 races, difficulty doesn't matter. I would like to point out you can do the same race and the tracker goes up each time, so you don't need to actually do different races.
If you want a really fast way of getting this then you can create a blueprint at a circuit race (it needs to be one where we can set laps) and in the event settings set the following settings:
-Max number of drivatars to "off"
-Duration to 1minute
The rest you can leave default. When you start the race you will instantly win it when it starts. Then just simply repeat the same blueprint over and over until you have the achivement.
UPDATE: make sure you press continue at the end of the event, pressing restart and doing the race that way will not update the tracker. Thanks to NoHeros94 for pointing that out.
UPDATE2: You can change car after each race to earn more accolade points, you can get points for winning events in certain classes/types/manufacturers cars. Thanks to Zonky for the tip.
130 346 008 -thats a sharecode with the event settings listed above. To use that code just press start while in game, go to creative hub then eventlab and press
to search, from there just put the code in at the bottom.
Or you can earn this just through normal gameplay.