i have been teaching my self how to play and so far i have learnt master of puppets,riffs from acdc and chours of free bird and some iron maiden riffs. and i was wonder how hard the intro to thunderstruck is on a scale of 1 to 10
i found some tabs some have hammer ons and pulls off and others dont witch one is correct
You need to hammer on and pull off to play the riff properly. The ones with the slurs are correct.

and it's not that hard. I'd say 3 or 4.
I have less talent than the rest of you.

I say 6 or 7. But even if it was a 10, that shouldn't stop you from trying.