hello! i use a lot of references when i compose drawings here are my favorite sites that really help me out:

Croquis cafe has plenty of references with models of all shapes and sizes! I go to their vimeo to do gestural warm-ups! https://onairvideo.com/ 

if i want a specific pose i make scenes at https://webapp.magicposer.com 
they have an app but I find that its easiest to use the browser version! You can also put in shapes to block out other elements in your composition

https://sketchfab.com  has a BUNCH of rotatable 3d models i use it for tricky furniture! I dont have any archi software so I sometimes use sims too sksk

Old school loomis pdfs to incorporate into your reading!
Figure Drawing for All Its Worth: https://illustrationage.files.wordpress.com/2013/04/andrew-loomis-figure-drawing-for-all-its-worth.pdf
Drawing the Head and Hands: https://www.alexhays.com/loomis/Andrew%20Loomis%20-%20Drawing%20the%20Head%20and%20Hands.pdf
Creative Illustration: https://illustrationage.files.wordpress.com/2013/04/andrew-loomis-creative-illustration.pdf

and lastly website ni kim jun/ggi pampagigil lang, pampaasar para ganadong ganado ka https://www.kimjunggius.com 

That's all for now! Happy drawing!

Heres the magic poser ref with that bar scene i drew a while ago, i also ink in colors i think are fun to distinguish the different areas/elements, and bc inking in black makes me feel lethargic but pink is fun and i have the attention span of a baby!