OP I am 28 years old and I have been struggling to find a 9-5 corporate job for nearly a year now and you get a given a what is a free ride thanks to your mum's connection and you squander it by quitting the job because you had nothing to do and was bored. Which made reading your post so frustrating as I would have loved it if someone could open doors for me to step on the Job front instead of trawling job listing and sending out 3-6 application per day and get either nothing or "rejection" back.
You could have initiative and look around the office, get to know the people, the company, research on what your role involves.
But nah you were like "lets quit, make my mum look bad in the process and post this on gaf."
I feel sorry for your mum.