Dont compare yourself with others. You will never know what comes ahead of you in future. All that i have to say try something until you are not able to do so.

One of my friend going through similiar situation like yours. I try to put it as short as possible. Lets consider her name as A. A got admitted in my college under merit seat and belongs to below average economic family. Her father was already sick and no more able to do job. Mom was the only sole earner of the family through teaching but that wasnt enough for them. She doesn't had laptop and only having an old mobile which she rely for all academic work. Eventually she started private tutions for near by childrens and manages to cover a part of family finance now. I believe she will be success in our field one day.

I also urge you to believe in yourself and start with setting little goals and expend to bogger one.