Your lyrics are written like a prosa text, the only phrasing I can recognize are the commas.
I can feel a rhythm ... are there rhymes?
- Notate it in the form of a poem: verse lines, strophes.
- Write dots and dashes underlining short and long syllables.
- Mark slashes (pseudo-bar-lines) ahead the accentuated words.
- You don’t need to notate the exact rhythm in music notes: there are different solutions. E.g.: the first pronoun “I” can
be on beat of measure 1 or an up-beat.
Structure: (apologize, I can‘t adjust the marks with the syllables).
I crashed down on 51 in my space coupe,
I keep my bible and my rifles in the same room,
Me and I walked the same road cause its a time loop,
you don't trust us until you see it in the news.
Quarter notes => -
Eighth notes => .
Accents => :
Sixteenth notes => ,,
in brackets () => rests
You can create your own marks of course.
this rhythmical interpretation is very simple, I know. When rapping you can use more syncopations and triplets ad libitum.
I don‘t think you improve much by notating the rhythm. My advice is: listen to other performers, write your texts, recite them when walking.
Btw: your lyrics are great! Is this the ordinary schizophrenic US-citizen? Johnny Cash or Donald Trump?