You have to get into a Masters (/or PhD) degree with the mindset of learning more about a specific field.
If you take random courses, you'll just end up learning about a bunch of stuff which will be obsolete in a few years that you will never use.
Exploration is fun, yes, but a post-graduate degree is not really for exploring your options.
Exploration is fun, yes, but a post-graduate degree is not really for exploring your options.