Honestly I wouldn't bother getting grinds for a subject like religion. It's more about learning than understanding so I'd just buy the Veritas books and teach it to myself. That beng said, only take it up if you're genuinely interested in religion, philosophy and that type of thing and can write very well under immense time pressure (the exam consists of 8 two to three page essays at 17 minutes apiece!) Sometimes you might need to suppliment your books with online notes because they're a bit out of date. Once you look at exam questions you'll see what I mean. If you want to save time then I'd recommend section G as your elective. It's simple and short, albeit a bit boring and airy fairy. Also, the sample answers on here are way too long so don't get freaked out by them. I think you need a registered teacher to sign off on your project though so maybe enquire at school about that. It's a nice subject so if you do it I hope you enjoy it.
Contradictory to the paragraph above, religion is more about understanding rather than learning.
Key parts of the religion course are philosophy (Ancient Greece), you must understand this, morality, conscience, etc.
You may need a teacher to sign off on your project - consult one. In general, you need guidance. You need guidance on many different areas of the course as well as the project as it can get confusing if you are doing it alone. I would recommend a teacher for weekly grinds. Don't expect a H1 if you attempt to self teach. I am not trying to put you down, but you are trying to cram a two year course with no understanding of it. How can you 'teach yourself' if you do not already understand it? You cant. However, you could definitely achieve a pass i.e. H5 to H4 if you really worked at it (video lessons, constant essays, reading Veritas and other religion course books). The project is concerning though, as a teacher is required to A). Deliver to you the state exam paper and B). offer you sufficient guidance in completing it.
I stand by what I said. Fair enough, having a glance at the syllabus might make you think it's all about understanding, critical thinking, analysing and all that stuff, but realistically they're never going to ask you to debate Plato's Theory of Duality, just to outline it, which isn't rocket science. Honestly I think the poster above is making the subject sound harder than it actually is. Anybody who can write well and manipulate language could get a H3 easily I'd say, and that would be with minimal effort. Don't be put off. Ultimately the only person who knows the best for you is you. Good luck with your decision.