Part-time job while in Full-time education. Would this effect my benefits?

Hey guys,

This is my first time posting on here so, please bare with me.

I have been wanting a job for a while now and, I am in full-time education in college doing around 12 to 14 hours a week (Monday to Thursday). I've seen a Sainsbury's store not too far from my home offering a part-time job, 24 hours a week at a £6.23 per hour rate (around 4/5 days a week).

I want to work there since the money could help me buy school resources and possibly motorcycle which I could use to commute to school and possible work with.

On the other hand, my mother is telling me not to since it will effect the Child Tax benefits and I will have to start paying the rent for the house because the house benefits or whatnot (I am not too sure of the name). In my defense I don't see the problem since I am still in full-time education so, I am doing what they benefits are asking me to do, I am just working on the side.

I am not too sure on what the rules are for working part-time and being in full-time education, and I could not find nothing on Google that covers it.

If I was to get the job, will the Child Tax Credits stop and, will I have to start paying for some of the rent to stay at my home? It would also be great if somebody can post some sources where I can read more about this, as I do want this job but I don't want to mess stuff up for my mother at the same time.

Thanks a lot!