Lol .
Well i do Further Maths for CIE 
but not privately, as in a whole 1 and a half year course. 
@astarmaths: Its not that difficult 
 
 But yea, i would not recommend studying it privately, or over a short period of time. Cos honestly, it can take u sometimes 1 hour to just figure out a question. Unless u have a tutor or something, that would help. 
and By the way: If you really want to do Further Maths, its actually recommended for the people who can get really high scores for the Maths A Level. So yea, if youre not super good in that, I would not risk doing Further Maths