Check out these YouTube channels, lots of excellent free content. Some of them have specific 14-30d challenges too for beginners or intermediate yoga practicioners (e.g. look at their playlists)
Do yoga with me (specifically the ones with McAlpine)
Bad Yogi
Fightmaster yoga
Yoga with Adrian
Yoga forBJJ
More or less in that order, but depending on what I want to be working on, browse those or follow their playlists.
