Starting a CPA (Cost Per Action) marketing journey can be a profitable venture, but the ideal starting investment can vary widely depending on your approach, experience level, and goals. you can consider some factors when determining your initial investment like Education and training , Website and Hosting , Paid Traffic, Content Creation e.t.c. Always Keep in mind that success in CPA marketing often requires a learning curve, testing, and refinement of strategies. Also start conservatively, learn from your experiences, and gradually increase your investment as you gain confidence and see positive returns. It's also essential to have a clear budget and financial plan to avoid overspending or taking unnecessary risks.