Hello,

You can either directly contact the HR section of the company that you would like to work in and send them an email stating your interest to work there as an intern and your qualifications.

Or if you know anyone working in that company then you can approach them and ask for a recommendation to join there as an Intern.

You could also research and find out the contact details of the head of a particular project or department in the company and write to them about your interest.

Also there are various online platforms like Internshala, LinkedIn, etc that posts various Internship opportunities. you can search for one that seems to be in your area of expertise and apply for it.

Good Luck