Hi @Lakshitha!
I would suggest that you visit the F1 Workshop and [Formula Student/SAE Workshop](Formula Student/SAE Workshop - 2016 - SimScale CAE Forum](Formula Student/SAE Workshop - 2016 - SimScale CAE Forum) pages that are dedicated to students trying to get in touch with aerodynamics of vehicles.
General resources of CFD can be found on this page: A collection of CFD resources.
Let me know if these pages are helpful!
Best,
Jousef