I do it every Ashtami. I follow procedure by Sri Sri Ganapathi Satchitananda Swami. Audio is available for 3 times in 20 min.
You can slow it down. Google it there are several versions available from Sri Ganapathi Satchitananda Swamiji. This Tue/Wed is the pradhana Anaghashtami day. There is also a Manasa pooja that is 10 min. Please do - very auspicious