Hello!
I'm currently an undergraduate English student who started uni in September 2014 and have so far been here for almost six months which is crazy. I've always been a lover of English all the way through school and it's always been what I would consider 'my thing' - I've also always been an avid reader. When it came to the point where I decided I wanted to go to uni, having it in mind that I would like to teach at some point in the future I was at first considering a teaching specific degree, although I soon changed my mind after doing research and attending open days (which is really important, and you already probably know that). I came to the decision to study English because it was something I loved and it's so wide and broad that at the end of it I could do so many different things other than teaching if I decided I wasn't interested anymore.
In the six months that I've been at uni so far, the biggest difference for me from A level is the level of independence and the quick pace. At uni, the contact hours for English are not a lot - probably eight (give or take) at the most and I do 50% literature, 25% language, and 25% creative writing. This means that in the free time I have it's up to you to do the reading required for the seminars, read the books that your seminars will be on, and when you have assignments, work on them without anyone moaning at you. When you have an assignment to do it will be up to you to go to the library and do some research to find books to help you and to find criticism and sources to support the points you make, etc. It's also at a much faster pace and sometimes it will feel like you're reading a few texts a week which is tough going. If you're organised and lover of English, you'll be fine! I wouldn't change it for anything, I love it.