20 days to make £110 - I'm 15?

[Cowman001]

"I don't care how hard I'll need to work"
"no way I'm going to do car washes or stuff like that"

Life is full of hard work and to earn money you are going to have to do things you aren't going to like. Not everyone can get the job of their dreams without work. Making money on the internet is rather hard and takes a long time to accomplish. Unless you can manage to make a viral video on youtube within 20 days, I would say you are $hit out of luck.