Same here. I left school with no qualifications after severe bullying at a crap comp secondary school.
I got a low paid drudgery job as an office junior in a tiny local accountancy practice, earning less than a pound per hour, basically making the tea and taking the post.
I did my O levels and A levels by a mixture of self study and evening classes at the local college, alongside a full time crap job and also weekend work too! That took several years and I just scraped through with bare passes.
By that time, I'd worked through the firm and had moved into the accounts side of things and persuaded the boss to pay for the professional body joining fee to become a trainee accountant, and to finance the self study books - 16 exams over a further 5 years. He woulnd't give paid time off for study nor exams so I had to use holidays to study and exam days.
Finally, some 10 years after leaving school, I qualified as an accountant and never looked back. But by God it dominated my life and was hard work.
So, yes, education is the key. I'd have qualified years earlier had I gone to a decent comp, but life is what it is. You can't just live an excuse like a crap comp and use it to justify a life of no job or minimum wage work.
Nothing comes easy. Education of any kind, whether academic or manual/trades or vocational, etc is hard work and takes time, but you need to keep an eye on the target/end result.