You can learn English on your own or by joining a good class or with a good English teacher.
No. Its not true.
Yes, some what.
Yes, it happens in certain cases. Not all.
I have studied from Gujarati Medium, can I learn?
Yes, there is not age for learning and attitude matters.
I get bored very easily, can I learn?
Sorry, you first have to learn not to get bored and then learn anything else; English not excluded.
I tried but I failed in learning English, what should I do?
It happens. But it is not a final failure. Change your attitude and you will learn English.