I guess learning about every single law in every single situation would be this one thing that's "sure they're not easy and they take time" but:
Quoting from the swedish driver education book[1].
> It is not desirable to have 100% adherence to the rules. According to the criteria for a category B licence, you must display “good judgement when interacting with other road users”. A reasonable interpretation of this statement is that you may depart from the rules in some cases.
I feel the same can be said about many other situations.