Find your part for each movement via YouTube prompts. This video omits the first section of Movement 1. The conductor cut this section due to its difficulty!
On Windows, MIDI files work in Windows Media Player but not using VLC
Singing in a choir can be excellent fun, prized for the camaraderie alone. But if you want to take your choral singing a bit more seriously, you will have to develop certain musical skills. Learning scales and key signatures will help enormously with your sight-reading, chords will act to improve your harmonizing and internalizing intervals will promote your ease in singing new or unfamiliar music.
Here you can learn all these things and more: