When I started enbrel I was referred to a derm nurse, she organised the bloods etc, and it is she that I have seen since then. Maybe you will get an appointment with one too.
Healthcare at Home provide the enbrel, and they are contracted to send a nurse round to show you how to inject on the first two occasions I think it is. It is quite straightforward, as long as you are ok with needles.
Make sure you take the enbrel out about 30 mins before injecting, it doesn't sting so much.
Good luck!