Legal documents are written to a convention. Once the convention is visible, the reading gets much easier.

Definitions near the front govern everything after them, and a term may mean something quite unlike its ordinary sense. Reading a provision without checking the definitions is the single most common error a lay reader makes.
A judgment typically sets out facts, the parties' positions, reasoning and conclusion. The part that binds later cases is the reasoning essential to the outcome — not every observation the judge happened to make along the way.
A citation identifies case, court, year and report series. It looks forbidding and is simply a filing reference, and learning to decode it turns an impenetrable footnote into a document you can actually retrieve.
Statutes are amended and decisions are overturned. A text found online may be the version as enacted rather than as currently in force, and acting on a superseded provision is a genuinely common mistake.
Understanding the shape of a document is realistic. Judging how it applies to a particular situation is not, and the gap between those two things is where people most often come to harm.