Trying my hand at All Apologies by Nirvana on guitar.... help?

[Tommygunn]

Yes guitar...

I've always been facinated by this song ever since I was a little kid (I remember it being on the TV and radio ALL THE TIME). So since I can play a couple other Nirvana songs on guitar, I figured I'd give the opening lick to this one a try. But for some reason I just can't get my timing right. Any advise? Thanks