Hello~ New Master's Academy has a discounted price b/c of COVID, so its lowest price is $14 a month iirc. They have video lectures for various subjects like drawing, painting, sculpting, etc. I recommend looking at classes by Glenn Vilppu and Steve Huston to start learning about figure drawing and anatomy! They're both master draftsmen and professional teachers (Steve Huston was a teacher at Disney )
If you prefer learning from books, you should check out Michael Hampton's Figure Drawing: Design and Invention or any of the books from the Morpho anatomy series! Hope this helps !