Psychology is a really respectable and important A-Level if you want to go into econ/accounting/finance because a subfield of Econ is behavioural economics and rational choice which includes psychological work. I have never done Psychology but I heard that it's a really complex A-Level - but I bet the complexity will gradually show as you move throughout the year so change while you still have time. And as long as you're in your 1st year of A-Levels, I say go for it. As long as you study and catch up on the work then I'm sure you'll be fine. GO FOR IT B4 U REGRET.
P.S. I also h8 English Lit from GCSEs lol so maybe I have some bias against it but follow your gut.
BTW this may not relate, but I did A-Level Sociology despite the class being majorly made of students who did GCSE Sociology and I graduated from the class with the highest grade (A*). I promise you, you have time to catch up, and if you feel angsty about the work, always try and talk to your teachers about help and support.