I guess windows doesn't want to format my card to fat32, it only has he option for exfat.
Is there a good program to do it with?
You're sure it's unpatched? (checked the serial num?)
You need the switch, a USB for it to connect to PC or android, or something else that can send the payload needed.
You also need a good micro-sd card that's ideally at least 64gb, but depending on what you want to do with it then more size is better
And finally it's good to buy a 'jig' that you need in order to put it into RCM mode, which you can buy online for around 5 to 8$ (alternatively it's possible to make a paper clip do it, but I'd recommend the safer route)
Also to be decent at getting info but especially to follow guides.