I totally disagree with Malc4d. Why not do your whole PPL (or the remainder of it, since you're already a fair way into it) on a taildragger? There aren't too many schools that offer this as standard (I used to know of one, but they only offer FAA PPLs), but I don't see any reason why an understanding FI shouldn't be able to arrange it for you.
I do agree with QNH1013 - make sure your instructor has at least 100 hours of taildragger time if possible. But doing your initial training on taildraggers will mean you avoid having to have a future taildragger instructor get you out of the bad habits you'll have picked up in tricycles!
FFF
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