Learn Hangeul, the Korean alphabet. The alphabet is a good place to start when you're learning to speak Korean, especially if you hope to progress to reading and writing later on. Korean has a fairly simple alphabet, although it may seem strange to most English speakers at first because it is completely different than the Roman alphabet.
Hangul letters and digraphs are called jamo (자모; 字母) or natsori (낱소리). There are 24 letters and 27 digraphs (and sometimes trigraphs) formed from these letters in the modern alphabet. Of the letters, fourteen are consonants (ja-eum 자음, 子音 "child sounds") and ten are vowels (mo-eum 모음, 母音 "mother sounds"). Five of the consonants are doubled to form the five "tense" (faucalized) consonants of Korean (see below), while another eleven sequences are formed of two different consonants. The ten vowel letters are combined into eleven sequences for diphthongs.
The following letters and clusters of letters are found in the modern script:
14 consonant letters: ㄱ g, ㄴ n, ㄷ d, ㄹ l/r, ㅁ m, ㅂ b, ㅅ s, ㅇ null/ng, ㅈ j, ㅊ ch, ㅋ k, ㅌ t, ㅍ p, ㅎ h
5 double ("tense") consonants: ㄲ kk, ㄸ tt, ㅃ pp, ㅆ ss, ㅉ jj
11 consonant clusters: ㄳ gs, ㄵ nj, ㄶ nh, ㄺ lg, ㄻ lm, ㄼ lb, ㄽ ls, ㄾ lt, ㄿ lp, ㅀ lh, ㅄ bs
6 vowel letters: ㅏ a, ㅓ eo, ㅗ o, ㅜ u, ㅡ eu, ㅣ i
4 iotized vowels (with a y): ㅑ ya, ㅕ yeo, ㅛ yo, ㅠ yu
5 (iotized) diphthongs: ㅐ ae, ㅒ yae, ㅔ e, ㅖ ye, ㅢ ui
6 vowels and diphthongs with a w: ㅘ wa, ㅙ wae, ㅚ oe, ㅝ wo, ㅞ we, ㅟ wi
In addition, there are numerous obsolete letters, as well as a number of sequences which are no longer used. Some of these were only ever used for transcribing Chinese.
13 obsolete consonants: ᄛ, ㅱ, ㅸ, ᄼ, ᄾ, ㅿ, ㆁ (as distinct from ㅇ), ᅎ, ᅐ, ᅔ, ᅕ, ㆄ, ㆆ
10 obsolete double consonants: ㅥ, ᄙ, ㅹ, ᄽ, ᄿ, ᅇ, ᇮ, ᅏ, ᅑ, ㆅ
66 obsolete clusters of two consonants: ᇃ, ᄓ, ㅦ, ᄖ, ㅧ, ㅨ, ᇉ, ᄗ, ᇋ, ᄘ, ㅪ, ㅬ, ᇘ, ㅭ, ᇚ, ᇛ, ㅮ, ㅯ, ㅰ, ᇠ, ᇡ, ㅲ, ᄟ, ㅳ, ᇣ, ㅶ, ᄨ, ㅷ, ᄪ, ᇥ, ㅺ, ㅻ, ㅼ, ᄰ, ᄱ, ㅽ, ᄵ, ㅾ, ᄷ, ᄸ, ᄹ, ᄺ, ᄻ, ᅁ, ᅂ, ᅃ, ᅄ, ᅅ, ᅆ, ᅈ, ᅉ, ᅊ, ᅋ, ᇬ, ᇭ, ㆂ, ㆃ, ᇯ, ᅍ, ᅒ, ᅓ, ᅖ, ᇵ, ᇶ, ᇷ, ᇸ,
and 17 of three consonants: ᇄ, ㅩ, ᇏ, ᇑ, ᇒ, ㅫ, ᇔ, ᇕ, ᇖ, ᇞ, ㅴ, ㅵ, ᄤ, ᄥ, ᄦ, ᄳ, ᄴ.1 obsolete vowel: ㆍ arae-a ('sub-a'; still used in the Jeju dialect and sometimes as a substitute for ㅏ a in logos and advertisements)
44 obsolete diphthongs and vowel sequences: ᆜ, ᆝ, ᆢ,[are these iotized vowels?] ᅷ, ᅸ, ᅹ, ᅺ, ᅻ, ᅼ, ᅽ, ᅾ, ᅿ, ᆀ, ᆁ, ᆂ, ᆃ, ㆇ, ㆈ, ᆆ, ᆇ, ㆉ, ᆉ, ᆊ, ᆋ, ᆌ, ᆍ, ᆎ, ᆏ, ᆐ, ㆊ, ㆋ, ᆓ, ㆌ, ᆕ, ᆖ, ᆗ, ᆘ, ᆙ, ᆚ, ᆛ, ᆟ, ᆠ, ㆎ
Notes:
The four iotated vowels are derived by adding a short stroke to the basic vowel. They are counted as part of the 24 letters of the alphabet because the iotating stroke is not a letter on its own. In fact, there is no letter for y in Hangul.
Of the consonants, ㅊ chieut, ㅋ kieuk, ㅌ tieut, and ㅍ pieup are aspirated derivatives of ㅈ jieut, ㄱ giyeok, ㄷ digeut, and ㅂ bieup, respectively, formed by adding an extra stroke to the unaspirated letters. These are also counted as separate letters of the alphabet, as the aspirating stroke is not a letter on its own.
The doubled consonants, which are used in South Korea, are also counted as separate letters of the alphabet. In North Korea, their sounds are written by combining ㅅ s with the basic consonant: ㅺ, ㅼ, ㅽ, ㅆ, ㅾ
