We've been playing a couple of months now. C, G7, F, A, are all easy chords to play. Lots of early Beatles. Blame It On the Bossanova, Blowin in The Wind, Eight Days a Week, End of the Line, Happy Birthday (in C), Jamaica Farewell, Leaning on a Lamp-Post, Leavin On A Jet Plane, Mellow Yellow, Memories are Made of This, Octopuses Garden, Return to Sender, Waltzing Matilda, YMCA, You're 16
That should get you going!