Invest in film-producing experiences by going to film school or taking film workshops. You may also ask a film production's permission to be an intern or a participant observer in feature film productions so you become familiar with how the industry works.
Look for production-related jobs in student or independent productions. These jobs may not necessarily be producing jobs, especially if you're just starting to immerse yourself in film production work, but acquiring production experience is essential for you to get the initial production credits you need to gain credibility as a production worker.
Seek an apprenticeship from an established producer or director. Tell the producer that you intend to take a producer's career track in film production. Apprentices usually do not earn any compensation, though some do get an allowance. Alternatively, you can seek an assistant's job for an established producer, co-producer, director or associate producer. This way, you can gain more industry experiences and an actual job. However, these people usually hire those with work experience already, so make sure you still invest in your formal or informal film education.
Join film clubs or film-related social networking groups. These help you get informed about different aspects of film work. They also often provide announcements about job calls, festivals and conventions that can help you become more exposed to the industry. These can also help you establish networks and connections.
Look for co-producer job postings online and in film schools and organizations, then make a resume showing the film credits you already have, along with your educational attainment and any awards, citations and festival screenings of the films you were involved with.