White noise to block out sounds?

So I want to start getting into mindfulness meditation, and think that a good place to do this would be on the long bus ride I take to school. However, the bus is really loud, with traffic, screaming children (its a K-12 school), etc. Should I use some sort of white noise app on my phone, or just try to meditate in spite of the noise. Maybe I should start with the noise and not use it once I'm more experienced?