In Forza Horizon 6, Skill points can upgrade car mastery, and car mastery can unlock free Wheel spins, Super Wheel Spins, and up to 250,000 Cr for free.
Here is the best method to farm skill points whether you are using PC or Console, this method is guaranteed to work.
Buy a Subaru Impreza 22B-STi
Auto Show > Jump to Manufacturer > Subaru > Impreza 22B-STI Version (1998 Subaru Legendary Class B).

The car cost 86,000 CR. After you buy it, you need to upgrade the Subaru.
Upgrade the Subaru
Go Home > Select the Impreza 22B > Upgrade & Tuning > Custom Upgrade > Setup Manager > Load Setup > Search > 140242027.

After upgrading, your Subaru should be in S2 with 805 points. Buy and Install this setup then you have to upgrade the car mastery.
Upgrade Car Mastery
Upgrade & Tuning > Car Mastery > Upgrade All.

After upgrading all skill points of this car, you should have one free super wheel spin.
Join SP Farm Map
Creative Hub > Event Lab > Play Event > Search > 890169683.

Join the event > Solo > Choose the Upgraded Subaru > Difficulty settings:
Follow these difficulty settings.

Start race event > Press W or Throttle if you on controller > After the first race > click restart and start race event again.
Repeat this for about 1 hour and 30 minutes and you will get 999 skill points.
If you don’t want to do it manually use ANNA and enable auto drive.
To enable ANNA auto drive simply press the button you see on the screen, for my case i use the keyboard it’s C and 2 for auto drive.
End of Guide.
