I was just randomly looking for stuff to learn for my level and found this. I've heard it before, but I got no idea where from. It sounds like some Medieval Times stuff to me, like Castle music. Thought maybe not many heard it before. I used this tab https://tabs.ultimate-guitar.com/tab/misc-traditional/greensleeves-tabs-644438 if it's ok to link it. It's my 2nd favorite Guitar site now, I couldn't go HAM, cause the time.
I messed around with it for about 5 minutes more, some of the notes can be Hammered-on and Pulled-off, it's pretty cool. The spots I found felt natural with the progression, if I tried to name the Chord Shapes it would be: A Minor, G something, A Minor, E Major, C add something. I think those are the base chords and a few Embellishments. I hope you like the Song, I was sight reading it.