aileena
My only advise ...
You're using the raw shrimp method with no live rock or live sand.
This tank will cycle - but it will take longer than if you had introduced some bacteria from live rock or live sand.
Tossing in even a small piece of live rock, or adding some live sand would most likely speed things along.
You could even add a cupful or two of established sand from a trusted friends tank, but be careful. Know the source.
Here's what could be happening;
Raw shimp added to tankwater begins to rot and produce ammonia.
Ammonia is there - you know it - you tested for it.
BUT
The bacteria have not reproduced at a rate to convert the ammonia over to nitrite yet. The bacteria just are not there yet in numbers .... so the ammonia testing looks like the tank's cycle has stalled out.
It hasn't ... it just will take a little longer than you hoped.
Add some live rock if you can - even a chunk or two would help get the bacteria population kick started
Good luck with your tank !