I am no great songwriter but why not follow the general rules for a typical rock song ie,
Intro,
Verse, verse,
Bridge,
Chorus,
Verse,
Bridge,
chorus,
Middle 8
Verse,
Bridge,
Chorus, chorus,
Out.
If you write a few bars as above for each part, and then vary each somewhat as you progress through the tune, bringing a mixture of the variations together for the last verse and chorus.
Tou would also have a longer tune.
You have an interesting riff beginning at 0,25 that could act as a chorus, perhaps with a key change.