Everybody's journey is different, and it depends on whether you are starting from a base of having some musical knowledge, such as playing an instrument, or not. It also depends on the level you want to achieve - music producers are constantly learning, even those who have been in the industry for 20+ years! In terms of learning the required skills to get started, these are some estimates:
- Learning your DAW (Digital Audio Workstation) and the production techniques: 2 years
- Learning music theory and composition can depend on the level of depth that you want to achieve, ranging from 3 months to 5 years.
- Playing an instrument to a proficient standard: 5-7 years
Once you are working in the industry, it can take anywhere between 5 and 10 years to build up a reputation, and solid network of paying artists/clients. You learn and grow, and eventually become profitable with your craft.