That's cool that your studying a combination of Psychology and Engineering. I'm doing something similar and it seems to be very rare to find someone who is working in both of those fields. I'm sure that in the UK people would be even less understanding of this. It seems like over there you just choose one subject and that's all you do for the next three years. Keep on looking at those library books. I think the most important thing as an undergrad is to follow your interests even if this means dialling back on the effort you put into class work.