The Pārāyaṇam procedure is explained in detail below -
1) Please keep the Srimad Valmiki Rāmāyaṇam book ready. We recommend Srimad Valmiki Rāmāyaṇam books by Gita Press Gorakhpur Publication.
2) On Day 1, you begin the Pārāyaṇam by reading the ādi-mangala shlokas. After that read the first 2 sargas of Śrīmad Vālmīki Rāmāyaṇam which starts with the shloka
तपस्स्वाध्यायनिरतं तपस्वी वाग्विदां वरम् ।
नारदं परिपप्रच्छ वाल्मीकिर्मुनिपुङ्गवम् ॥1.1.1॥
After reading the first 2 sargas, read the antya-mangala shlokas. This will be your Day 1 of Pārāyaṇam.
On Day 2 read the ādi-mangala shlokas, read sarga 3 and 4, read the antya-mangala shlokas.
On Day 3 read the ādi-mangala shlokas, read sarga 5 and 6, read the antya-mangala shlokas. You can go on like this. Each day you can read a minimum of 2 sargas. You can also choose to read more sargas based on your convenience.
4) You can access and download the ādi-mangala and antya-mangala shlokas from the link below
ādi-mangala and antya-mangala Shlokas
Audio of sample Pārāyaṇam session is given in this page.