Been playing it a week now. Sounds okayish, but no near perfect. I'm still struggling with timing, but I think my problem is I stop strumming when I change chords.
It's early days, but just a heads-up so you know that is a
REALLY bad habit to get into, and can be hard to get out of. (I know, I did it!)
IMHO: Give some special effort to practicing the two things separately - Hammer the 1 minute changes some more for the chords involved, and practice strumming to a metronome without changing chords (hold one chord down, or just mute the strings). Use an on-line metronome if you haven't got one. Keep going, without introducing chord changes, until you can do 4 down strums, to your metronome, in your sleep, then come back to the song - still with the metronome.
Think of this stage as like being at a fork in the road. You can either take one path that lets your left hand rule the roost, or take the other and make your right hand rule the roost. At the moment, there's not much to choose between them, and it might seem natural for your left hand (or fretting hand) to take charge, as this is the one doing all the complicated stuff. With just a little effort, though, you can gently force your right hand to take charge. The problem is that once you venture down your chosen path, it can be very hard to get back. Make sure to choose the path that puts your strumming hand in control, as this sets your rhythm (which is THE most important thing in music).
It really won't take long, but an ounce of prevention is worth a pound of cure, as they say, and it's important to get in early (IMHO!).
/rant !
Andy