しずかな やま
Shizuka na yama
し ず か
shi zu ka
Letters you already have. ず is す with the same mark as が.
しずかな やま
Shizuka na yama
しずかな ほし
Shizuka na hoshi
しずかな あかり
Shizuka na akari
No new boxes. 22 of 46 is not unfinished work — you are using Japanese you already know how to write.
You have not learned everything here. You are not meant to. See what you recognize.
静かな部屋に 碗から光が溢れ
夕の山だけが 窓の外に続いた
You can already see some of it.