I chose to go to sixth form as this was the best option for me. This meant that I stayed at the same school but some people do change schools at this time. I'll talk briefly about settling in to a new school and making friends as I haven't experienced this I am no expert on it. I would say be yourself, get involved in activities that the school runs and remember there are other people in the same boat as you.
Onto the lessons, I did English Literature, Geography, Business Studies and Psychology. I enjoyed most of them apart from English as I found it a lot harder than GCSE and I didn't particularly enjoy the material that we covered. Obviously different schools do different things so don't be worried this is just my experience yours will be completely different. I found subjects that I hadn't done at GCSE a lot easier as you started working at A level level straight away so there wasn't a big jump which I found in English and Geography. I'm sure you've already been told this but A levels is a big jump from GCSE you need to do a lot more work.
One of my top tips is to stay on top of homework you get a lot more at A level and a shorter time to do it in. At my school we were given study time so I did my homework then but if your school doesn't offer this make sure you try and do your homework on the day that it was set as it quickly builds up. Revision is another key thing you need to make sure you are revising as exams quickly creep up on you. Try and keep your notes up to date and copy up anything you miss.
My last tip is enjoy your time at sixth form as it only happens once. Try and take all the opportunities that your school offers you as you'll regret it otherwise. I wish I'd done more of the things my school offered me. Although I did get to go on some great trips, I was lucky enough to go to Iceland and I got to see some great plays as well.
I hope you enjoy your year whatever you are doing and if you have any questions don't be afraid to contact me. I would be happy to answer any questions you have about GCSEs, choosing your options or A levels any question you have I'll try to answer it as best as I can.