I see still life and life model drawing as very similar. In both, you have to observe from life and render on paper the shapes, masses, darks, and lights that create a believable, well-composed, proportioned drawing of the subject.
The challenges are very similar, with the added twist that in model drawing you also have to convey the model likeness and expression, which by itself could become an intimidating task.
It gets a little easier if you focus on the single shapes making up the whole and the negative spaces. For example, when you see an eye, you may break it down into small shapes that make sense in your head, things that may look like a small triangle, next to a moon shape, with a thick side, and a dark spot above it, etc.
Similarly, with still life, I like to break down each object into lines and shapes, darks and lights, and abstractly construct things. It's always fascinating how they all come together to make a recognizable subject appear.