The Hebrew alphabet has 22 letters plus 5 final forms (used at the end of words). Every letter is a consonant, vowels are marked separately as dots (niqqud, lesson 02). Click any letter to flip it and hear the sound.
22 Main Letters
5 Final Forms (sofit)
Remember, Five letters change shape at the end of a word: Khaf, Mem, Nun, Pe, Tzade. The sound is the same, only the form changes. They're called "sofit" (final).
Tricky look-alikes, Bet (ב) vs. Khaf (כ). Dalet (ד) vs. Resh (ר). He (ה) vs. Chet (ח). Telling these apart is your first real challenge.