Level 1 is where everyone starts. In the syllabus that HSK 3.0 is built on (published by CLEC in November 2025, in force from July 2026) it comes to 300 words and 246 characters you should be able to recognise. The handwriting list works a little differently: there is one list of 100 characters for Levels 1 and 2 together, so my writing book covers both.
If you learned from older material, the numbers won't match. HSK 2.0 Level 1 had 150 words and the 2021 standard listed 500. The 2025 list sits in between at 300, so an older book will either leave words out or spend time on ones that now belong to later levels.
The 300 words are everyday basics. In my vocabulary book they are split into 30 small themes: greetings, family, numbers and money, days and times, meals, shopping, school, getting around, the weather, likes and wants, and a unit of little words like 很, 也 and 都.
If you're starting from zero, I'd begin with the vocabulary book and do two or three characters a day from the writing book alongside it. Leave the practice tests for the last few weeks before the exam, when you want to see the question types under time.
Counts are from the HSK syllabus published by the Center for Language Education and Cooperation in November 2025 (in force from July 2026), which is what HSK 3.0 uses.