fender jaguar cobain

How do I get a Nirvana sound on guitar?
I’m using a Fender Jaguar with two Humbuckers, but how could I get that Cobain sound like in “In Bloom”. What modifications do I need to make on my guitar?
I’m no expert by any means, but what I have found so far is that the amp seems to have more to do with tone than the guitar. Maybe do some searches on what type of amp and/or effects he used in the studio.
in bloom cover nirvana (again? i know!) fender jaguar avri kurt cobain