You may choose the satisfaction of working on your own terms over the comfort of a regular salaried job. However, this choice typically comes with the uncertainty of not receiving a predictable income each month. Most prudent financial actions such as budgeting, savings and investments work on the assumption of a predefined regular income, out of which you will meet expenses, save and also invest for future goals.
If your income does not fall in the pattern of regular, defined receipts then you may have to make a few changes in how you go about to reach the desired outcome of a secure financial future.