Humanities & Social Sciences

For all those biting their nails, and dreading about the impending danger, check the tips mentioned below, to score 90 per cent marks in the exams:
(1) Study regularly: Do not assume that the final examination is not important enough as a summative assessment. A regular study always leads to good performance.
(2) Review sample papers: It is advisable that the candidates solve sample question papers and keep practicing till they get a hold of the pattern.
(3) Revise the NCERT books thoroughly: For CBSE board students, all questions from the NCERT book should be revised thoroughly.
(4) Focus on time management: Stick to a schedule and solve at least one sample paper every day. The breaks should be pre-planned and short, with a definite end. Try using alarm clocks to mark time.
(5) Practice writing: Since you will have to do a fair amount of writing during the examination, it is critical to ensure that there is a uniform speed of writing throughout the entire duration of the test to minimise the chances of not completing it.
(6) And finally take care of your mind and body: Relaxing, doing deep breathing exercises, meditating etc. helps you stay completely free of stress. Eat home-cooked food and avoiding oily junk food which will make you lethargic. Staying healthy is the key to a fully functional brain and it will also reduce the chances of your falling sick at this critical stage.

Of course. Bachelor of arts is an undergraduate course that students of any stream can go for. Understandably, it might be a challenge for the first year as you will not have learned the basic concepts, but no worries. Psychology is a subject that if you are interested genuinely in, you can surely catch up. Plus, reading your friends' 11/12th standard books might help (if you have the time for that, that is).
Best college/university would depend on where you stay, where you are prepared to move, and, of course, your 10/11/12th standard scores. It is best if you research online depending upon your choice of location and subject choices etc.
Earning in lacs, well, not immediately, of course. The most lucrative (since you ask about being able to earn in lacs) field in psychology would be psychiatry, but since you haven't taken biology and I assume you don't want to go into medicine, I won't dwell on that. Other lucrative psychology fields are clinical psychology, sports psychology, forensic psychology, student counseling, industrial-organisational psychology, and neuropsychology. All these are quite lucrative as you climb up the ladder which will happen with time, patience and hard-work.
It also depends upon where you are employed, whether you have a private practice or if you are affiliated to a hospital. On an average, psychologists who work in private institutions are paid higher than those who work in government-run institutions.
For knowledge sake, the least lucrative fields of psychology are social work, rehabilitation counseling, and child care work.