What do they say is learning Buddha and practicing Buddha?

It depends on your own level and realm.

Generally speaking, learning Buddhism is the wisdom of learning Buddhism, because Buddhism contains traditional cultures such as Confucian culture and sage education. You can teach people to be kind, love peace and care for others. Because such equality will make you happier and healthier.

Secondly, learning Buddhism is to know the causal cycle and understand the laws of everything in the world. This is more conducive to your physical and mental health. Because when you understand the cause and effect, know the reincarnation, you won't do evil, then you won't be more miserable, then you will be happier than others.

Buddhism is abstruse or not. Read more Buddhism in vernacular Chinese, so that you can understand it thoroughly.