Most knitting patterns share the same basic architecture. There's a materials section, a gauge section, abbreviations, sizing information, and then the instructions themselves. Reading through all of it before you pick up your needles isn't overcautious. It's the difference between following a route you understand and getting lost halfway through.
Start with gauge. Not to swatch yet, but to understand what needle size the pattern assumes and get a sense of the fabric you're heading toward. Then look at the abbreviations list. Most patterns use standard terms (k for knit, p for purl, sl for slip) but some designers define techniques specific to their pattern, and those definitions are always listed near the front. Reading them before you begin means you won't encounter an unfamiliar instruction mid-row when you least want to stop.
Understanding sizes and stitch counts
If a pattern offers multiple sizes, instructions are written with each size either listed in order (smallest to largest) or separated by brackets: 80 (90, 100, 110) stitches. Before you start, circle or highlight your size throughout the entire pattern. Doing it at the beginning, when you're calm and not mid-shaping, means you won't have to search for the right number in a hurry.
Stitch counts appear at the end of many rows or sections, usually in brackets: [45 sts]. These are checkpoints. If your count matches, you're on track; if it doesn't, you know to pause and find the discrepancy before it compounds over the rows ahead.
A stitch count at the end of a row is the pattern confirming that you and the designer are still reading the same thing.
What to do when an instruction isn't clear
Patterns are written to be re-read. If something doesn't make sense on first pass, read it again more slowly before assuming it's an error. Most confusion in pattern reading comes from reading too fast, or from missing context earlier in the instructions that the current row relies on. Go back a section.
If an instruction still doesn't make sense after a second reading, knitting a few stitches slowly and literally, doing exactly what the words say stitch by stitch, often makes the intention clear in a way that reading alone doesn't.
Reading the schematic
Most garment patterns include a schematic: a simple line drawing with finished measurements. Read it alongside the instructions rather than ignoring it. The schematic gives you the finished shape in visual form and tells you what the numbers in the pattern are building toward. If you're ever unsure whether you're on track, measure what you've knitted and compare it against the schematic.
The schematic is also useful at the very start, before you've cast on anything. It shows how the pieces relate to each other, which makes the construction logic much easier to follow.
Pattern notation that trips people up
Asterisks mark repeated sections: *k2, p2; repeat from * to end means you work the two-stitch sequence all the way across the row. Round brackets used inside instructions, like (k1, p1) twice, mean you work the bracketed sequence the stated number of times before continuing. Square brackets almost always indicate stitch counts.
Take these slowly on your first encounter with them. They're consistent once you've seen how they work, and you'll only need to learn them once.