Hello anons, I am a little nervous, in 2 days I start university, I must make sure that I am 23 years old and I have not been a good student at school.

I will enter the career of psychology, I would like to specialize in forensic or clinical, but anyway.
I need advice to be an A1 student and if possible stay in the top 3 in my classroom to start.

How should I study?
How much should I study?
where should i study
study alone or in a group?

since I must put together a schedule to organize myself, damn I'm very stunned.