Attukal pongala procedure

Hi, I am from kannur who loves at trivandrum. . If possible i want to attend this year's attukal pongala. So if i am from kazhakootam how to reach at attukal. And what are the procedures "vritham " and other ritual i should follow. Should i buy things priorly or is it available to buy from the venue. How to book place and all Please enlighten me trivians 🥹