This is some information I wish I would have known just starting out. Hope it helps other people as well. 1.)
you are going to need to draw nude models. Get over your modesty and draw the human body. I suggest this site https://line-of-action.com/practice-tools/figure-drawing/ Or get this paid generator to use your own resources. https://cubebrush.co/marketplace?q=gesture%20drawing&product_id=d9q6yq
3D models are fine, but they don't help you learn how gravity and weight affect the body. So keep this in mind when using them.
Do gesture drawings at least once a week using as few brush strokes as possible to show the energy in the model. The more you do this the fester and the more fluid your art will start to look
Also, do life drawings by painting the nude models after intensifying the lighting so you can see how light forms to the body. 2.)
Research the golden rat