I am an international student from Nepal. I entered to US on august of 2006 with an F1 visa. After that I went to university here in US for 3 years sponsored by my sister who is a US citizen. And on fall of 2009, I had to drop out of my college due to some personal as well as financial problems and ever since I haven't been enrolled to any colleges or universities yet. So my status as an F1 student is totally messed up.
I have few questions. I have learnt about applying for a US permanent resident through family. As my sister is already a citizen and my mom holds a green card, do I have any chances of getting approved for green card if I do my process through my family? I was 19 when I entered US but I am 24 now. If Yes, through which family member should I apply? Does my present status creates impossible scenario?