iOS and iPadOS

Hi all. I'm looking to learn how to use Garageband. I have an iPhone and Mac but wanted to primarily start with my iPhone as i have the Shure MV88 Microphone and currently no USB C cable to attach to my mac. I am a vocalist and play Ukulele and would be collaborating with others so essentially, I need to produce my part and then send it out to other musicians so they can add theirs. I also need the ability to use a clicktrack. Never done anything like this so any help much appreciated.