I know after Japanese language school most of students go to Vocational School but is it good Idea.

i am 20 years old who want a job in cloud computing and i do have aome skills and still learning but most of japanese jobs required N3, N2 and i don't speak japanese. Here my qustions

1. Is it good idea to go japanese language school for 12 months.

2. what you do after japanese language school look for job or Senmon Gakko.

3. how much you left with after after all expenses from your one year salary.

4. Any fast process.