What kind of part-time/holiday job can I do at 12?

Hi, I'm 12 1/2 years old and would like to buy something for my mother (for her birthday), but since I don't get any pocket money, I would be interested in finding a job to do during the holidays.

Little information about me

I am at a community school (everywhere nivo M) as a secondary school

I am completely German (maybe you can offer to learn German as a foreign language

And I have a little brother who is 9 (sometimes I look after the neighbors' children around the age of 4

A job that also works online would also be good (but no need)

I also talk to other people

If anyone has job suggestions please write me quickly and how much money I can earn per hour

LG: Lisa