Step 1 in your multitrack recording will be the capture of each of the instruments. Here are some guides on how to record.
Sound on Sound 1
Sound on Sound 2
Sound on Sound 3
Vocals
Vocal Duet
Choir
Ensembles
An acoustic guitar – can match the audio with these mic placements?
An electric guitar - can you match the audio with these mic placements?
A drum kit
Can you match the audio with these mic placements on the snare drum?
Can you match the audio with these mic placements on the drum kit?
Can you spot the two errors in this drum kit capture?
Can you match the audio with these mic placements on the congas?
All these audio tracks have errors – can you spot the same mistake on two of them and a different error on the third?