Register your business name with appropriate government trade/business department - Consider if your business is going to operate as a sole enterprise, a partnership or limited liability.
Then you would also need to register with your IR for tax purposes. Consider getting an account for calculating tax though. It saves you time and enables you concentrate on what you know best, rather than messing around with the figures.
Unfortunately there is no such thing as a free lawyer. Lawyer's highest priority is to extract money from their clients.
That said, under certain circumstances you may be eligible for a public defender. There is an application process, to see if you can pay for your own or utilize one that is paid for by the taxpayers. If you qualify, a public defender can review your case and possibly attend hearings with you. If you take it to trial - the public defender will handle your side of the trial.
Also, some large law firms have their money grubbing lawyers do a pro bono case once a year. You might actually luck out and get one that knows a thing or two about criminal law.