Hi Prabhakar,

Hope you are fine.
Thanks for the query.
In order to apply for the UK study visa you first need to apply for a course at a UK university.Once you get the offer of admission from the university the relevant documentation has to be done keeping into consideration the guidelines put up by the UK High Commission for the international students.
If you have any further queries, don’t hesitate to reply back or start a new thread.

Regards,
Rivalni

Here, Have a look at this blog:
https://oyaschool.com/uk-visa-application/