The "English" learned in our country is actually more inclined to American English. Not to mention the spoken English influenced by American culture.
In fact, when you get used to American English, the tone of British English is very strange. Moreover, in spoken English, the vocabulary used is different.
The spoken English in the world is basically American pronunciation, but the vocabulary usage is more formal than that in Britain. For example, most people don't say autumn but autumn.
You can go to see some English movies, such as German movies. Just listen to the British accent.