Should I do a 'mystery shopping' job?

I want to move out of my parents house as soon as this year if possible, if not, next year; but to do that, I need money. I do have the money to move out now but I want to have some extra money saved just in case something happens.

I don't have much experience and confidence, but I have applied to many jobs, only to be rejected or ignored. Therefore, I was wondering if I should earn money through mystery shopping.

I have no idea how it works though. If you have experience or any advice, please do tell me.

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