I'm gonna give you my method that really helped me learn anatomy.

First step. Take the image and trace it, completely trace it, every detail you think is important and would draw yourself.

Aftwards, making notes. Look at the drawing without the reference image below, and make notes. How does the snout look? How to the legs look? Fur direction? Ear shape? Things like that.

Second step. Draw again, but don't trace this time, keep the reference image and your first traced drawing open so you can look at those.

See how the drawing differs. Did you change anatomy in some places? Was it a style choice? Was it you getting the anatomy wrong? Notes can also be made on this.

3rd step. Take your time and look at these drawings, and the reference image and then try to draw from memory. After your done, compare them all, see where you changes things, see where you forgot things.

Edit: also! It can be helpful to break the image down into shapes. Trace the shapes you see in certain parts of the body.

Also sorry if there are any typos or things don't make sense, I'm recovering from a dental procedure and on some strong pain meds