To apply for a green card, you should first check your eligibility by visiting the USCIS Green Card Eligibility Categories page. Assuming you are eligible, you should then file a Form I-485 with USCIS along with all required documents and fees. After filing, USCIS will schedule a biometrics appointment to collect photos, fingerprints, and signatures. Finally, USCIS will schedule a Green Card interview before making a decision on your application. After completing these steps, you will receive a decision on your green card application.