Hiragana is the basic Japanese syllabary. It has 46 characters, and each one stands for a sound: a vowel (あ a), a consonant plus a vowel (か ka), or n (ん). Below is the full chart as flashcards, in the usual order, with the Hepburn romaji for each. The plan further down covers all 46 in a week of short daily practice.
Cover the romaji and say each sound out loud before you check it.
あ
a
い
i
う
u
え
e
お
o
か
ka
き
ki
く
ku
け
ke
こ
ko
さ
sa
し
shi
す
su
せ
se
そ
so
た
ta
ち
chi
つ
tsu
て
te
と
to
な
na
に
ni
ぬ
nu
ね
ne
の
no
は
ha
ひ
hi
ふ
fu
へ
he
ほ
ho
ま
ma
み
mi
む
mu
め
me
も
mo
や
ya
ゆ
yu
よ
yo
ら
ra
り
ri
る
ru
れ
re
ろ
ro
わ
wa
を
wo (said o)
ん
n
Once you know the 46, the rest of hiragana comes from small marks. Two short strokes (dakuten) make a sound voiced: か ka becomes が ga, さ sa becomes ざ za, た ta becomes だ da, and は ha becomes ば ba. A small circle (handakuten) turns the h row into p: は ha becomes ぱ pa.
A small ゃ, ゅ or ょ after an i-sound character makes a combined sound: き ki + ゃ is きゃ kya. A small っ doubles the next consonant: きって kitte (stamp).
Stop using romaji as soon as you can. Once you can read the 46, switch every card and note to hiragana, or the romaji will keep doing the reading for you.
With hiragana done, you are ready for katakana and then a vocabulary deck. For your own textbook or class notes, StudyCards AI turns a PDF or notes into flashcards in about a minute, and you can export them to Anki.