I was B40 before. I took metrobus to work in early 2000s

The best thing to do is to invest in yourself, and to invest in knowledge

Find what you like to do, what you are good at doing and what pays well for doing it

It took me a while, but I learned a new skill and became better with it until it was worth something

Investment with little money isn't going to give you a lot of returns, unless it is risky investments or gambling

I suggest you first take a step back and think what works best for you

I read a few self-help books, authored by Marcus Buckingham. The thing about reading books is that it is very generic. It's only powerful when you are able to apply the knowledge

For example:
I can't cook, don't like to talk to people much, like to sit in front of my computer whole day.
I like to do puzzles, figure out algorithm and to fix software bugs
I had an IT degree but was working in IT support answering calls, and I decided a software developer was the best career for me
I check the vacancies market, there was a demand of Java developers at that time. I then learned how to do programming myself with some online resources
Managed to switch jobs, accepted low pay in a small company to start with so I can get some real experience
Fast forward 5 years, salary doubled and 10 years later working in UK now

Only you yourself can determine what works best for you. Maybe you are an excellent cook, or a salesperson or a mechanic. Maybe you are not there yet but can be good at it but you are just doing the wrong thing.
Being near the top in every industry normally pays well. Top footballer, top sales person, top cook.

What works for me might not work for you because we are just different people. People told me back then doing sales can make a lot of money, but I'm not a people person. By comparison, by university course mate did do sales, but he was a very introvert guy so that did kindof shock me but he eventually quit because it just didn't suit him well. Not everyone is cut out to be a salesperson, cook, footballer, software developer

So you just need to find the right balance of:
1. What you like to do
2. What you are good at doing
3. What people would pay you good money for doing