You should do really, really well if you study like that and are able to keep it going throughout the whole of the 2 years. Don't work too hard though, there's no point in pushing too hard because you'll peak too soon. A levels are hard, but not hard enough to warrant completely voiding your social life for 2 years. Very few people I know did that, and the ones that did are quite...odd. :L I went out drinking almost every Friday, sailed most weekends and played plenty of Xbox, I still managed fine.
If you're following a very structured, intense, thorough schedule like this one, it can be very easy to sort of kid yourself into thinking it's going great when realistically you could be doing things differently and getting a better result. Make sure you're always honest with yourself about how you're doing. I fell into this trap when doing my A levels for a little while, luckily it wasn't during exam time so I had ample time to fix it. It's worth bearing in mind.
EDIT; change the bit about how you behave in class, it's antisocial, rude, and it's going to make it really hard to enjoy college. I chatted, messed around etc in a fair few of my classes, it made college way more fun and it didn't stop me learning either.