Hi! I just finished psych and fine art but i was in a joint class for fine art with photographers. Honestly I found psychology a lot easier, it was more interesting and took way less time at home, photography is a subject you do mainly outside of school and unless you know you will have the motivation to be going out far to take photos it’s hard to keep up with the workload.
On top of that, the grade boundaries are insane for photography, an A is 89% (OCR 2019) whereas for psych it’s 63% (AQA 2019). Another reason for psych is that it’s seen better by top unis, only the top 10 (oxbridge level) care about it but they have preferred and non preferred subjects and photography is a non preferred subject whereas psych is preferred.
Overall if you did really well in GCSEs for photography and you have a passion for it and will start work IMMEDIATELY (you can’t catch up like in psych cause it’s coursework starting from yr12) it’s definitely manageable. Otherwise, I’d opt for psych (unless you struggle with memorisation and heavy content, then i’d pick photography). Hope that helps.