When I was first learning MATLAB, I used a book... an actual, physical artefact! Nowadays: MATLAB problem --> standard web search --> someone has almost certainly addressed it in the community, and there are many excellent answers. If not, the documentation is generally clear, but I also find that examples are critical for me to get to grips with a new function or feature.
There could be more poetry in the documentation.
Unlike those unfortunate technical sites,
Whose grudging release of the facts feels like charity,
Mathworks web pages are clear and precise,
Indeed, one may say they are models of clarity.