Just finished my English Lit A level - gonna mirror what itsConnor said. Enjoying the texts really helps, and you'll find the material more interesting to engage with in sixth form, because the course gets broader and less of it is about spieling off about foreshadowing. There's a lot more of understanding why writers employ techniques and how critics have typically engaged with them (this is great because you can just learn a couple of quotes from specific critics and that fills the relevant AO, and from that point you make a couple of links between that with the text and you've got marks).
There is a lot more memorising, especially at AS (on the old specs I found A2 less time consuming), but you'll write essays over the year and as long as you keep them, you've got ready frames because there'll be those key quotes you can apply anywhere.
Looking at the Spec, 20% of the whole A level is coursework, which is usually a big perk of doing English (if you perfect and redraft this as much as possible before submitting it to your teachers, you guarantee yourself a nice boost towards your grade).
Good luck, and I'd definitely recommend taking it. AS was a drag but by A2, it's such a light relief from subjects like history, which just have so much content!