I am currently in year 10 doing english lit&lang, maths+further maths, spanish, triple science, re, geography, history and latin and polish as an extra. So i know what pressure is haha.
RE isn’t as easy as people say it is! Depends on what your school chooses as the syllabus ethics or marks gospel islam or judaism, catholic christianity. It is a lot to fit in.
As for geography that’s a great choice, it is A LOT of work though but once you learn the way to answer the different questions and learn the key vocab you’ll be fine. You learn about both the physical and human environment.
As for history i never liked it, i was forced to take it and it’s not too good. Maybe it’s just my judgement speaking but there’s too much to learn and because of such a big syllabus we have to get through it really quickly. Weimar Germany, Cold war, reign of queen elizabeth and crime and punishment through time are the topics. I’ve only done weimar germany and it didn’t start of too hard but it got terrible towards the end haha.
Spanish is a good choice, lots of work to learn a language in two years but it’s worth it.
What I’m saying is, take the three humanities it’s possible and it’s not too much stress especially if you enjoy them. But if you were to drop one for another subject i would say drop history.
Hope i helped a bit.