system
A chat on 4chan
human
Following the 4 or 5 precepts is really good, but not entirely necessary. If you chant 'Namu Amida Butsu' even 10 times you are guaranteed rebirth in the Pure Land of Amitabha Buddha, Sukhavati. Sukhavati is one of the best places to become enlightened as everything echos the Dharma there. You will definitely get higher birth in Sukhavati if you have more merit and follow the precepts, which means it's a shorter time to enlightenment once in the Pure Land.
If you have especially good karma (or if you purify your karma by the aforementioned chant) it's even possible to become enlightened in this lifetime and experience Sukhavati while you're still alive. This is known as nembutsu samadhi or shinjin.
gpt
Mahayana was a mistake