...but I need help.

I'm pretty much a newbie when it comes to guitar. My friend taught me a lot of the basics to get me started, and I've successfully played many songs by Nirvana, but their stuff is fairly easy. This song really gets to me, so I think it'd be great if I could play it. I found these tabs, which seem quite accurate, but I'm having trouble figuring out where my fingers go for the best transitions. I'm also wondering whether or not to use a pick.
The sun is gone, but I have a light.
I would not use a pick for the first part, just keep it in your mouth or something. Also, I use the rule "one finger per string" if I'm finger-picking. But, I would use my thumb and index finger to pluck the first note. So practice it the way it feels comfortable but sounds correct.
i use a pick for it and it sounds fine...but i suppose i could be doin somethin wrong lol...im happy with it lol

line 6 spider valve 212
ibanez RG5EX1
vinci VE5PK
Thank you all your your input. I was just kinda just wondering like how to position my fingers. I figured that the first part was only finger picking.
The sun is gone, but I have a light.