After 10th

Hi Yashi,
Admission to undergraduate courses in Psychology is either done on the basis of merit or through the university/college's own entrance exam (or both). You might want to first identify the universities that you would like to apply to, and then check the eligibility criteria and availability of the forms on their website. Typically Delhi University, IILM University Gurugram, Banasthali University, IP University, IGNOU are popular for their courses in psychology. For instance, IILM University Gurugram is accepting applications for admissions. Visit www.iilm.edu.in or write to admissions.
The application forms for some of the universities are already available on their websites, you can check for the same. For universities like Delhi University, you will need to wait for the applications to open.