I honestly can't remember as I was 4. You'll adjust slowly. If you move into a compound, your lifestyle won't differ much from what your used to in the UK. If you live in a compound, you'll most probably live with a lot of Europeans/Americans and can go about having a regular social life since compounds have pretty much everything (pools, halls with events, supermarkets, restaurants etc), it's not so bad. It'll only be an issue if you move into an appartment/villa that isn't located in a compound since you won't be able to access things like a gym, pool, supermarket etc with ease. I live in an apartment so it's really hard for my family but oh well. You'll be fine, honestly, but you'll need to get used to relying on your Dad for transport and staying at home a lot more.
It's JPGS (won't mention the entire name for security reasons). I've always wanted to go to Georgetown and Duke university and Inshallah i'll get in if I continue to do well in school.
My life isn't that exciting trust me. I'm Somali American and have lived in the US for a year before moving here. Moving there shouldn't be too much of a culture shock since I travel to Europe/America every summer, i'm used to the Western life style too
I'm honestly not too sure but it'll probably be either maths, biology/chemistry, economics or finance/accounting. Need to decide whether i'm more interested in a science/business related career. How about you? And yes, you've used the correct terminology but it's ''major in'' not ''major as'.
P.S. the rules aren't too bad. Just wear an abaya and scarf (there are religious police in the malls that come up to you if they realise that you're muslim and force you to wear your head scarf, no joke) when your going out. Don't talk to non-mahram's in public for no apparent reason, don't get rides from non-mahrams etc. See, it's not too bad!