After you must have joined the newcomer community by clicking 'SUBSCRIBE' you begin by introducing yourself which is the first achievement post as a newcomer. see https://steemit.com/hive-172186/@shivamkumar001/compilation-of-achievements-task-post-by-shivamkumar001. it will put you through the necessary achievement posts. Stay updated on the site to get useful information. Everything may not be clear at first instance but with time you will do well