A great beginner song and very fun to play with friends and sing along.

Link Youtube

Link Piped

My tip: On the first Downstroke only play the Root Note (lowest note of the chord). The rest I play with normal strokes. It makes the playing more interesting and sounds great.

Also I play a normal D in the Chorus and I play the D7 as the last chord in the bridge. (two bars normal D and then two bars D7)

I posted the express version, if you need a full version you can find it on his channel.