Hi,
For becoming a psychologist, you can pursue B.sc in psychology after class 12. There is also a B.A. in psychology but you want to do it more scientifically you should go for B.sc in psychology.
After M.sc you can pursue any specialization like clinical , health ,counselling, industrial psychology etc. according to your area of interest. You can further go for doctorate level in psychology.
You can get in job as a counsellor for sports, schools, colleges, health centres etc. and even research work.

For more detailed information,refer to the following website:

https://www.careers360.com/psychology-course
Hope it helps.

Best Wishes