Hi im in S5 rn and i crashed higher psychology and im taking it currently. I also want to do psychology at uni, for me i liked the course it's very very essay based subject but the structuring is relatively easy. I don't think the course content is that much, im also taking higher human biology and would say that has WAYYYY more content compared to psychology but when ur actually taking notes in class it feels like loads . However i need to be very clear, like everyone else in my class hates it, theres a lot of note taking and it can be a bit dull at times, ive also talked to psych students at uni at an open day and they said that the higher psychology course isn't like the uni course and they didn't like the higher psych course structure. They also said you definitely don't need to take it for uni, i think they said it was about a 50 split between who took higher and who didn't.
It definitely can be a challenging subject, i quite enjoy it and excel in the essay structure required but a lot of my class failed the prelim and had to be moved down to nat 5, some of my friends who i thought would get As and Bs all got Cs (I still got an A but i definitely found it more challenging in a exam structure) I was really stressed about psychology before because i thought you had to remember the dates for all the studies but you don't - which makes everything a lot easier.