Hi Vaishnavi. Various platforms can help you like LinkedIn. You have to start with acquiring skill sets and the domain that you want to work in, understand the roles and responsibilities of that domain that you want to work in and enhance your skillset there, make a resume including your work experience, academics, extracurriculars and then start applying for the job with cold-emailing and resumes and cold letters.
Hi Vaishnavi, there are several job portals like naukri.com, monster.com, linkedIn that can help you look for your dream job. You can also start interning in a company and then progress forward as an employee. Do check out the seekho career counselling series to nail your job interview, get the perfect resume, etc.