@smg0385
I’m a little late catching on to the questions for this song lesson - apologies.
The strumming patterns (multiple) are not a prerequisite for moving to another module.
Justin here, like in many of the ‘beginner’ songs, presents varying levels of difficulty with which a song can be played and learned. these songs can stay with you and be songs you return to as you develop your skills, enabling you to enhance how you play them.
Hope that helps.
Cheers 
| Richard_close2u | JustinGuitar Official Guide & Approved Teacher