Hey,
I think the european health card is the blue card that you get from the post office. I have one to. But in the UK its best i would say just to sign up to a doctors where u will be moving to if u want a UK base.
On the training you need to study hard and yes the training is quite intense. The exams are not mulitple choice. I think the secruity 1 is.
Just listen to what they have to tell you in the training study hard and you will be fine.
Accommdation normally more than 1 of you are going to the same base and then you can hook up together are rent a place between the 2/3 of you.
Which base do you want to get???