should I try taking Melatonin (less than 0.5 mg dose)

Background: My fourth year has started. I haven't had a good sleep schedule in a while. I sleep around 1 am and wake up around 8 am. I want to start waking up at 6 am, so that I can get more school work done, and also because I have an 8:30 am class once per week. I don't want to be half asleep while attending it.

Problem: I have a really noisy family. They don't sleep until 12 am. I have to share a room with my sister, and she also doesn't sleep any time before 2 am. She keeps closing and opening the door, and other things that make a lot of noise. So, even if I try to start sleeping 30 mins earlier every night, the noise wouldn't let me. I can only sleep when I am extremely tired and sleepy because of this.

I was wondering if I could use melatonin to make myself more sleepy earlier rather than at 1 am. I plan on taking it 30 minutes before bed. Is this a good idea?