Among the many learning styles, what worked for me is diving in the "deep end" using Matlab to solve real work-related / studies-related problems. For every new function I came across, I read most or all of the documentation page and understood the inputs, the optional properties, the outputs and I went through some of the examples - all on the same page. At the bottom of most pages is a list of related functions which may be useful to browse through, too.
Example: https://www.mathworks.com/help/curvefit/fit.html
Browsing through this forum and taking the time to understand the snippets of code offered by experts really helps, too. It's really obvious when people asking questions here don't bother to understand the code in the answers and will therefore never advance their analytical skill set.
