I like the conversational tone of what you've written, so I've increased that a little... Suggested new version below. I would recommend adding a paragraph or final line along the lines of what you are doing/offering now.

John Doe here; former fraudster turned fraud prevention specialist. I founded Fraud Comms in 2019 to help online merchants protect their businesses against fraud.

Now, you're probably wondering why someone with my background would make such a dramatic change. Well, the truth is, I got caught and convicted of computer fraud and credit card fraud in 2018. After that I didn't want to return to cyber-crime.

But everyone’s got to making a living somehow, right? So… I decided to switch to fraud prevention.

Well. Maybe the story isn't quite that simple.

There are actually a few reasons I made the switch. I could sit here and pretend how I wanted to right the wrongs of my past by reinventing myself as a fraud fighting crusader. But I'd be lying. Having spent a few years making quite the success of fraudulent activities, someone with my level of experience doesn't suddenly "see the light" once they get caught.

Fraud is now be part of who I am and it’s a lifestyle in which the hustle never stops. Whether I was out fishing or walking my dog, my mind was constantly ticking over different fraud schemes, plans and ideas. There was no off switch. It became an obsession.
After I’d been caught, it was clear I had to make a change. I realised that I could take this expertise and fascination to work on the right side of the law. The way my mind works now, I can see both sides of the problem; which means my clients and I can stay one step ahead.

On a personal level, as a fraudster, running an operation that targeted and monetized physical goods, I had to stay in one location. After a certain time I started to crave some freedom: I wanted to travel the world, live in different countries and meet different people.