Biblical Hebrew is the language of the Tanakh: a Northwest Semitic tongue written in a 22-letter abjad, later pointed by the Masoretes.
What English calls Biblical Hebrew covers centuries of writing in the Torah, Prophets, and Writings. Scholars often distinguish earlier and later layers, but a learner meets one written tradition: consonants in the received text, vowels and chant marks added later.
Printed Bibles give the Masoretic Text: consonants, vowel points, and te'amim. That pointing is a reading tradition, mainly Tiberian, not a tape recording of the first authors. The same verses can be sounded in modern Israeli pronunciation for learning.
instruction, law
prophets
writings
Core vocabulary is small and recycles. Syntax is regular enough that Genesis 1, the Shema, and a psalm become readable long before you finish a grammar. Translation always chooses; Hebrew lets you see the choices.
Same letters and a shared core of roots; different tense system, particles, and everyday lexicon.
Twenty-two consonants, five final forms, and a script that shifted from paleo-Hebrew to the square letters used today.
A small grammar, the high-frequency list, and three short texts will carry you farther than a year of isolated drills.
Scrolls from the Judean Desert give Hebrew (and Aramaic) copies from around the last centuries BCE to the first century CE, without Masoretic pointing.
Same letters and a shared core of roots; different tense system, particles, and everyday lexicon.