Hello everyone, long time to talk!
Yesterday, I found a pretty useful program, which I would like to share. It's called Design Doll (links to website). It consists of a 3D human model that is customizable. All joints can be moved to obtain whatever pose you want, and even each finger can be adjusted.
I think it's a really nice way to get references of specific poses that are not necessarily easy to search online. I really like how you can also change the hands on the model. Camera angle, body shapes and types, etc. can all be changed.
The free version does not allow saving models and then reloading them, but being able to adjust the model as I need for my drawing is super useful.
Anyways, hopes this can help someone else who has trouble with poses, like I do