Ok so let me restart from the begining.
So i thought adding foobar with the component in the same folder would automatically play the fsb file but first you need to go at this page
https://imgur.com/kyGEa0A
Then install vgmstream component. Restart foobar and it will play the file. I'm actually listening to the soundtrack with the link i gave you.
That component wasn't in the archive, i had to download it separately. But thanks for the tip, now it works and i can even convert the files.