Spirit Guides And Auras

My name is Julia and I am 13 years old. I have known about my psychic abilities since the age of 12 and a lot has happened since then. My grandmother is also psychic, she told me about my guides and their names (an American Indian, my dad and a few more) I am having trouble with contacting my guides, I have tried meditation, talking in my head and out loud and automatic writing. I get an answer when I talk to them in my head, but it is not very strong and I can't decide whether it is them talking to me or me making it up.

There is a strange light in the corner of my bedroom at night, the corner is not facing the window, and there is nothing that gives off light, could this be my guides? I have also seen it move around a few times.

I can also see auras, but not in colour, I practice sometimes by looking in the mirror, and I see my teachers' auras quite often. Will I ever be able to see the colour? I have seen the colour of someone's aura briefly but I haven't seen any other colours since then, is there an easy way to see colours? And do the colours change according to your mood?

Do you have any tips on contacting spirit guides and getting strong answers?

Thanks very much for your help