Beginner friendly: Moderate

Cold Therapy and Thermal Contrast Optimization is a side hustle that involves using temperature variations to optimize health and wellness. Beginners without special skills or background may find it moderately easy to start earning a profit. Resources online provide information on techniques, benefits, and products, which can help beginners get started. I'd rate it a 2 because while it may require some learning and effort, it is doable with time and dedication.