Hi Ben
Sorry to hear about yuor colour blindness, this is something which afflicts me as well. Its great that you have such a passion for flying right from the start, if you do want a career in aviation from my lowly position as plan vanilla PPL this seems to be the best way to go about things.
There is a lot of discussion about relating to colour blindness, suggest you have a look at the Medical forum here for some useful tips. All I would say is that don't get your hopes up for a miraculous cure in the short term. Best instead to focus on the here and now, which in your case is approaching very rapidly indeed!
Briefly, don't get too worked up about the Skills Test. You do need to be prepared but you don't need to be perfect on the day, so if you make a mistake don't worry about it and carry on. The examiner wants to see you are a safe pilot, not a perfect one. Explain what you are doing and, if you need to change the way you are doing something, tell him or her.
Clearly you've set your heart on flying. For the foreseeable you may not be able to make a career out of it, the next best thing is to think about how you can do as much of it as possible. Think about a career which pays you enough to fly and gives you the time to do it...definitely worth giving a thought...
Best of luck.
BB