How to make money as a 14 year old.

My absolute dream is to be able to the MCR in concert and they recently hinted at coming to the UK. My mum struggles with money so wouldn't be able to buy tickets for me and and adult (I assume her) to go. She also loves MCR so shed probably buy a ticket for her but I'd be on my own. Obviously tickets with be hella expensive and I currently only have £5.60 to my name😔. I think I'll be able to get money from my gran but I'll need to save aswell. Right now I sell things online but that dosnt make me nearly enough money (quickly). I'm only 14 so I don't think I'll be able to get a proper job. I think I'll get a few baby sitting jobs etc but I'll need more money😆. I've seen those websites where you can get money for completing surveys, games, tv etc but are any of them legit? and can I even do them. If any of you have any websites/ apps that actually work I'd be really thankful to receive them😭