No, don't wait; go ahead and give the song a try. For one minute changes lose the metronome, not the point at all. For the song get familiar with it, then start using the metronome but set it slow enough to get the changes and gradually bring up the speed.
One minute changes aren't there as a "stop and master before proceeding" exercise. They are a focused exercise there to help you get your changes faster to support making said chord changes in a song. It is an addition to your routine to help you learn to make changes in songs, not a replacement for learning songs
Go a head and work on the song as part of your practice routine along with one minute changes. Both learning songs and one minute changes help you learn to make changes. One is specific one is generic.