Need help which fans I need to buy for this Case

https://preview.redd.it/ukl03hlgk5ig1.png?width=1280&format=png&auto=webp&s=aedd4867a6bcde960b64b68499612392b9daa7c1

Title says it all guys which kinds of fans do I need like reverse fans or regular fans? I think my exhaust are the 3 on the side