I had exactly the same feelings as you,but I finished my PPL first then did 25 mins in a Citabria spin training,then about a year later 40 mins spins in an Extra.
Spins are quite disconcerting ,and you will feel very disoriented at first.
My aim was not to get into a situation that I could not get out of,and primarily not to get into a spin in the first place!
As mentioned do it with an experienced instructor,there are lots in East Anglia although that is not much help to you,but as suggested,I'm sure there must be excellent places to do it nearer to you.
Lister
