If you are interested in the regular courses then you have to wait for the announcement for 2022 admissions though many institutes have already made that advanced announcement. However admissions will be only during the second quarter of 2022. On the other hand if you are willing to go for an online course then there are many open universities like IGNOU where you can register and choose a course of your choice.
Some of the good institutions for B.Sc. Physics in India are Madras Christian College, Chennai; Jain University, Bangalore; Loyola College, Chennai; Hindu College, New Delhi; Miranda House, New Delhi; St Stephen's College, New Delhi etc. You can visit their websites and find out the details of the 2022 admissions.
If you find the institute conforming to your requirement then you have to register in it and then choose or seek more information about a course, its fee structure etc and then proceed ahead in the matter.
In case you are thinking to go for a distance learning course then there are many institutes which offer it and you can consider them after seeing their credentials online. Some of these institutions are Sri Balaji Correspondence College, Sri Sai Correspondence College, IGNOU, Netaji Subhas Open Univesity, Jain Deemed University, University of Kerala, Calicut University etc.
Knowledge is power.