First of all, your English sentence doesn't make sense. " I usually do homework for 2 hours everyday"

It is meaningful。It means I do my homework for 2 hours in average everyday.

Yes,but you need reorganise the order~“通常，我每天花两个小时做功课”~

这个句子有意义，只是原文说的是两个钟头 :P

A little bit weird. You can say "每天我用四个小时做功课"