Congratulations, I don't think people appreciate how difficult the job is! I did a BTEC National Travel and Tourism at college and we were able to do cabin crew training - so much to learn. I was scared when I learnt how the No 1 person had to wear the horrible mask in the fire/smoke situation.
I've just come back from a tour of NZ - Heathrow to Singapore, we had a night and a full day in Singapore. Late that night we flew Singapore to Auckland.
My tip for surviving cattle class is take your own comfortable headphones, and when you want to sleep, use an eye mask.
We flew to Singapore from Christchurch and I stayed awake for the ten and a half hours. We had a five hour break (check out the waterfall!) then the Singapore to Heathrow flight. This flight is loooong - but this time I wore my eye mask and slept. Was so glad to wake up with only 5 hours left to go!