Classics are absolutely brilliant!! (and i'm sorry but aren't Classics teachers the weirdest but most brilliant human beings that exist??)
I'm in Y10 right now (year's nearly up though, so Y11 pretty soon... eek!), and I study both Latin and Ancient Greek with the OCR board.
Both exams are made up of
1) Language paper consisting of:
a)Comprehension
b)English to Latin/Greek sentences
c)Translation from Greek/Latin into English
2) Literature paper consisting of:
a) Verse: In Latin it's extracts from Virgil's Aeneid and Greek it's extracts from Homer's Iliad
b) Prose: In Latin it's extracts from Tacitus and Pliny and in Greek it's extracts from Herodotus
I would say that Latin is pretty easy, in fact I may even say it's the easiest subject I take (I did my end of year exam a few weeks ago which was a language past paper and got 98%!! Really happy about that!!!!), though that may also be because I absolutely adore Roman history and politics and I've been studying it for 4 years.
Greek's a little harder, just because I feel like there are way more irregularities, but that may just be because it's an accelerated course as we have to fit the same things that we do in 5 years of Latin into 2 years of Greek (the Greek classes are a lot smaller though- only 8 of us), but because I love it so much I put the work in and managed to do really well in my end of year exam too! (96%- but i think the exam was easier than Latin because we haven't completely finished the language side of the course).
I have also been lucky to have two brilliant teachers for both subjects this year. My Latin teacher is staying on next year but my Greek teacher is leaving and we're getting a different member of the Classics dept next year (though he is also a decent teacher).
I think Classics are so brilliant because of how wide a range of disciplines they cover. You look at a much more analytical and mathematical side in the language section when looking into cases, tenses, voice, mood etc. but then you have the much broader and wider side in literature with text analysis. You also look into philosophy, as well as history and politics on the side.
We're all incredibly lucky to have the option to take Classics so early on (many schools don't have that option)- so, as Horace said, CARPE DIEM!! Take the opportunity you have!!
Also I love translating from original texts in Latin/Greek because you feel like such a scholar.
Maybe do some extra reading on the subjects though so you know whether you like them.
Here are some good books that I've read:
To do with the Iliad/Odyssey:
The Song of Achilles by Madeline Miller
The Silence of the Girls by Pat Barker
Lost Books of the Odyssey by Zachary Mason
Translations of the epics by E. V. Rieu are the ones I read
To do with the Aeneid:
Lavinia by Ursula Le Guin
The translation of the Aeneid by Robert Fagles is brill
General mythology:
Heroes by Stephen Fry
Mythos by Stephen Fry
Roman history:
Rubicon by Tom Holland
House of Names by Colm Toibin is a retelling of the Oresteia