So sorry Mat that it has been very long since you posted: the last time I visited the forum it was riddled with spam bot messages, glad to see it is back on!
So let me suggest Aldo Bova’s YouTube challenge, his handle is @unagondolaunremo. He is a wonderful teacher, has a ton of books for sale on Lulu, and is generous enough to read and, more importantly, play them all on video. He has a playlist for soprano/tenor with about 40 videos, which I strongly encourage you to take a look at. His is a complete method, so you’ll get the whole range of your recorder, and includes some 595 pieces, including exercises, and a ton of tunes. Once you get a few notes under your belt the tunes become challenging. He also covers ornamentation towards the end. It assumes no knowledge of music theory, though obviously you do have that already. I am a dye hard fan!
Another great source of information (and enthusiasm), though less systematic, is Sarah Jefferey “Team Recorder” YouTube channel. She also has a method, but it is not complete, and even in the parts where they overlap, less extensive than Aldo Bova’s.
If you are in a hurry and only need to brush up, the shortest adult method is Helmut Monkemeyer’s, with the Trapp Family method a happy medium between the brief Monkemeyer and the long Bova.
Enjoy!