You are up to your last vowel! Congrats!
HOW TO WRITE IT [Follow the red strokes from left to right]
ROMAJI - o SOUND - [as in OH nO!] 13 k wav
MEMORY: It looks like ' - a' but "OH! it's different
All other Hiragana letters are consonants + a vowel (except n)
HOW TO
WRITE IT 
- a' but "OH!
it's different
- This means 'the
color blue'
- This means 'hey!'
or 'Come here' - kind of rude...
- This means
'king'