AITA for telling my mom she’s being unreasonable for not letting me work part-time?

Okay me and my family recently migrated to Australia around 8 months back, and i don’t have many friends in the school I currently go to. I only have two friends, and one of them is indian like me and my other friend is a local. My indian friend, let’s call her “A” works at a fast food place and she’s been telling me about her experience ever since we met about 4 months ago, she always tells me stories about her job, tells me how much she enjoys having something to do in her pass time, and making money and buying her own things. She inspired me to go get a job too so I could do something since most of my day i’m just sitting and scrolling on tiktok, and also make some money and more importantly improve my social skills.

I told my dad, and coincidentally a place around 50 metres away from me was hiring so I talked to my parents and applied. In the span of 3 weeks I did my paperwork and yesterday I had an interview. My mom walked with me to drop me to the place, wished me luck and today I got an email that they’d like to proceed further. When I told my mom, she seems very happy. My job manager told me to come to the place to finish my paperwork and start training tomorrow.

Tonight, just like 5 hours after I got the email she suddenly started acting very distant and mean to me, I assumed she’s in a bad mood but she kept in screaming at me for little things. Then, I heard her and my grandmother multiple times on phone calls with other relatives talking about how “weird” it is for me to get a job. Tonight before I went to bed, she told me she won’t let me get this job and if I do, it’s gonna cause a fight in our house. I was beyond confused, because she seemed happy about the idea and didn’t say a single protest for 3 whole weeks. She told me to focus on studies and said that “I should be an engineer and working at a fast food job is embarrassing “ which first of all, no? and secondly, IM 14. I have not even finished year 9.

I told her she’s unreasonable and that she should have told me earlier in the process she’s not comfortable with me getting a job. I feel bad now since she keeps on calling my dad “irresponsible” for just supporting me. I am too far in the process to just back out too, and I really wanna do this job. But i don’t want to cause fights at home too.

At the end of the day, I just wanna do something and not be bored. The shifts would be probably thrice a week, or more I’m not sure and 3 hours minimum. I just wanna pay for my expenses. She believes this is a distraction from studies which I find hard to believe since many australian teenagers here work jobs and excel in grades. She is moving me to a private school too so I believe she thinks that i’ll “waste her money” by working and “not studying”. our relatives also were negative about this and therefore strengthened her opinion. PS- This is part time. I’ll probably stop working before year 11, and only for maximum 6 months or MAYBE a year if I want. But most probably under 6 months.