...Name a song that you think is fun...
.
There's this too. What's fun for me, may not be for you.
Pick a song that you like to listen to that's fun. If it's too complicated, simplify it at first.
If you get really stuck and can't do it at all, consider getting some lessons, if you aren't doing so already.
And the important thing to take from playing AC/DC songs is not that they're easy (though they obviously are), but how to play in the groove, be comfortably on time, and...have fun.