“be going to” and “would like to”

1. be going to

We can use “be going to + infinitive” to talk about future intention/plan which is fairly certain.
e.g:
I am studying Japanese. I am going to be a Japanese teacher.
She is preparing everything now. She is going to conduct a party next Saturday.
They don’t buy the concert tickets. They are not going to go to the concert.

2. 2. would like to+infinitive

Use “would like to+infinitive” to talk about ambition, hope or preference.
e.g:
I would like to speak Mandarin fluently.
I would like to go to Japan soon.
I would like to be financially free.