These are things I've found useful in my art journey. I'll list websites, books, programs, tools, etc. and I'll add more as I find them! This isn't the be all and end all of resources - just the things I've found most helpful.
This is a great book for learning how to draw the human body. The plethora of diagrams showing proportions of human bodies is very helpful, and I still refer to it sometimes. For a long time I would practice its simplified version of the human body to help pose people I was drawing from imagination. There's a lot of information here I haven't gotten to, but I learned a lot just from the first few sections.
This book is the one I find myself constantly going back to. It presents its information very clearly with plenty of examples. What I found incredibly useful is the way Michael breaks down every part of the human body into manageable, simple shapes and forms. Suddenly, drawing a basic human body became much easier. This is definitely one of my favourite books.
For drawing gestures this is a great resource to draw from. It has options for clothing, age, time and there's even references for animals. Some features require a subscription, but there's plenty of free stuff.
I use this site when I feel I need some variety. There's lots of options including the ability to only show clothed or unclothed models - which is great if you're trying to practice drapery one day and not drapery the next.
I'd recommend this book to anyone starting out with perspective. It's clear and simple and touches on most aspects of perspective drawing - 1 point, 2 point, 3 point, shadows, reflections, slopes, and more. This book teaches the basics and concepts of perspective drawing really well without being overwhelming.
