I'm not going to go into too much detail but for context, I'm a single parent to toddler DD, whose dad isn't exactly accomodating when it comes to having her at times it would make finding work easier for me. I'm also a student and receive universal credit. Plus this isn't exactly an aibu.. but anyway...
I've just started a new job, I do one shift a week and depending on how long it is, I typically earn £36 to £54 a week. This is all through "the books" and completely legit. Unfortunately I can't pick up anymore shifts here as I have DD and I can't get childcare (bar work and evening shifts).
A few months a go an acquaintance asked if I could could cover the odd shift at her business, and this was just paid cash at the end of a shift (yes I know this isn't exactly right but it was only supposed to be a couple of shifts here and there and not a long term thing). The issue is that the acquaintance is asking if I would like to work a regular shift a week, which I would, but is also paying me into my bank for the occasional shifts. She also wants me to be self employed, I suspect so she doesn't have to bother with tax and NI or holiday tbh.
How can I make this second job legit? I don't really know much about going self employed as I've never done it before. Would it be worth it for such a small amount each week or would it be better to decline the job?
Both jobs would total considerably less than the tax allowance each year, I think I can split this so I wouldn't pay tax but I'm not sure how to do that? How would NI work? Would i be complicated with universal credit explaining 2 different incomes? I've had issues in the past and I'm hardly loaded and rely on the extra money from UC each month.
Thanks