Your income is irregular and uncertain. Especially at the outset of a business it is difficult to know how much profit can be expected and when it will occur. Be careful not to sell on credit. Also, be careful not to take money out of the business too soon. You have tax advantages.
Many countries allow small business people to deduct the business expenses from the business income.
Expense that you incurred as an employee may now be tax deductible such as transport and utility costs. There is a lot of paper work and legal requirements to be met. It is important to seek professional advice from tax experts, accountants and lawyers so that you meet all the government requirements. It is important for you to keep good records and expense receipts. You have job satisfaction.