You hardly need a "course" for a taildragger, just a bit of practice with an instructor, or just someone who knows how
Or, on the other hand... find someone with the experience and qualification to train you properly! (as it appears that you
are trying to do!).
There is way too much DIY in flight training, why would a person not seek out proper training. Proper tailwheel training is becoming more of a lost art. I have personally watched several taildragger instruction sessions (with a real "instructor" and everything!) go wrong. This "instructor" did this right in front of me, while I was hovering, waiting to pass behind him...
I was not properly trained to fly taildraggers, but at the time did not know the difference. It was only after decades of flying them, and taking advice from really experienced taildragger pilots who saw my errors, that I began to get it right. Many pilots and instructors I see can't even land a tricycle properly, how would they ever manage a taildragger properly! I wish I'd had the training done properly in the first place. It is worth your effort, so keep looking....