If you know any other language that uses a Cyrillic script this should be fairly easy. The Bulgarian alphabet contains 30 letters as follows:
| Bulgarian alphabet | ISO 9 | Official transliteration | IPA | Name of letter | English equivalent |
| А а (а) | A a | A a | /a/, /ɐ/ or /ə/ | а | a as in "apart" |
| Б б | B b | B b | /b/ or /p/ | бъ | b as in "bug" |
| В в (в) | V v | V v | /v/ or /f/ | въ | v as in "vet" |
| Г г (г) | G g | G g | /ɡ/ or /k/ | гъ | g as in "good" |
| Д д/д (ɡ/д) | D d | D d | /d/ or /t/ | дъ | d as in "dog" |
| Е е | E e | E e | /ɛ/ | е | e as in "best" |
| Ж ж | Ž ž | Zh zh | /ʒ/ or /ʃ/ | жъ | s as in "treasure" |
| З з | Z z | Z z | /z/ or /s/ | зъ | z as in "zoo" |
| И и (и) | I i | I i | /i/ | и | i as in "machine" |
| Й й (й) | J j | Y y | /j/ | и кратко | y as in "yes" or "yoyo" |
| К к | K k | K k | /k/ or /ɡ/ | къ | k as in "kick" |
| Л л (л) | L l | L l | /l/ before е and и, /ʎ/ before ю, я and ь, /ɫ/ elsewhere | лъ | l as in "call" or "lend" |
| М м | M m | M m | /m/ | мъ | m as in "man" |
| Н н | N n | N n | /n/ | нъ | n as in "normal" |
| О о | O o | O o | /ɔ/, /o/ | о | o as in "order" |
| П п (п) | P p | P p | /p/ or /b/ | пъ | p as in "pet" |
| Р р | R r | R r | /r/ | ръ | trilled r as in Spanish "perro" |
| С с | S s | S s | /s/ or /z/ | съ | s as in "sound" |
| Т т (т) | T t | T t | /t/ or /d/ | тъ | t as in "stick" |
| У у | U u | U u | /u/, /o/ or /ʊ/ | у | оо as in "boot" |
| Ф ф | F f | F f | /f/ or /v/ | фъ | f as in "food" |
| Х х | H h | H h | /x/ | хъ | ch as in Scottish "loch" |
| Ц ц (ц) | C c | Ts ts | /ts/ | цъ | ts as in "fits" |
| Ч ч | Č č | Ch ch | /tʃ/ | чъ | ch as in "chip" |
| Ш ш (ш) | Š š | Sh sh | /ʃ/ or /ʒ/ | шъ | sh as in "shot" |
| Щ щ (щ) | Št št[d] | Sht sht | /ʃt/ | щъ | sht as in "shtick" |
| Ъ ъ | Ǎ ǎ | A a | /ɤ/, /ɐ/ or /ə/ | ер голям | u as in "turn" |
| Ь ь | ' | Y y | /j/ or not pronounced | ер малък | soft sign: y as in "canyon" |
| Ю ю | Ju ju | Yu yu | /ju/, /jo/, /ʲu/ or /ʲo/ | ю | yu as in "youth" |
| Я я | Ja ja | Ya ya | /ja/, /jɐ/, /ʲa/ or /ʲɐ/ | я | ya as in "yarn" |
Either learn these or have them by your side because subsequent lessons won't have Latin transcriptions.