I'm inexperienced BUT I've watched a bunch of vids
I shove because
1. Your short stacked( Less than 10 bbs)
2. All of the dead chips that are already in the middle. You can grow your stack by almost 20%!!!!
Also you mentioned "ICM", but doesn't that relate to how many players left/ your stack size? You didn't mention how many players left but your stack is SOO SMALL I don't know if you should be that worried about ICMs. From what I understand, your goal is to finish two three b/c of the top- heavy pay out structure of MTT SNGs