Just like to add my support to getting a high hours tailwheel (and current) instructor to do your differences training rather than any QFI who has a tailwheel auth.
Interestingly the VGSs teach the stick back method of taxing regardless of wind direction which to me will always look and be wrong as one day one of them might get into an aircraft that demands you treat it properly and forget!
Taildraggers are as easy to fly as any other aircraft but I only have current knowledge of Citabria and Chipmunk and mainly grass - its the points in contact with the ground that require constant attention! I love them and am reminded at least 1 in every 8 landings (or rather touch-and-goes) that constant attention is needed as I keep occasionally trying to wheel the Citabria onto grass - onto hard or as mentioned one wheel onto hard in crosswinds are very rewarding but three-point onto grass for me if in the Citabria! Circumstances rule and the beauty of tail-wheel is to keep checking the circumstances - never assume. Those little things will keep you straight!!!