Editing the film

I have begun editing my film in iMovie. I have had to add my soundtrack, that we did the dance to, onto the film as it is very hard to here it from the original recording from the noise of the water and background noise. There is a section in the middle where we all had to stop dancing and come out from under the water as we were so cold we all got brain freeze and froze, so I have had to cut this out. Because I have cut a section of the dance out, I have had to cut a section of the music out also, otherwise the music would not fit to the choreography recorded. It was very complicated trying to match up the exact second of music to the dance and it took a lot of time, but I eventually got there.
I now need to do my last bit of filming, in the dance studio, then I will be able to start editing my whole film together.