Selam sis @Pleasetellmeitgetsbetter . Fellow revert here. I think you need to have a good think and even if you don't take your shahada then there's definitely a need to look at how you can support your self financially in a safer way.
This might be the opportunity you need to look into adult education. If you have a look at your local council website they often have adult education courses available. Especially in London, and if you have certain circumstances they can be free.
In the kindest possible way, this way of earning an income will not be possible forever for you, or anyone once you start to mature with age. Then what will you do? I would take this opportunity to give yourself a safer life.
Also, you don't have to take your shahada as a big spectacle. I took mine at home alone with a friend on MSN, nearly 17 years ago! Intentions is the most important thing.
But only do it when you feel ready.
None of us are perfect and we all sin. But we should conceal out sins and have the intention not to do them again.
I think you are very brave and it's great your are thinking before making any changes.
Please continue to talk to us if you aren't sure about anything.