WC, will help a lot and your livestock will thank you for it.
You will go through a cycle as your test results are already giving you the indication.
Eyes on the ammonia and nitrite, if these are rising please do a WC ASAP before your shrimp will go belly-up.
Cycling will take a little longer as you need the ammonia to feed the bacteria, with a WC you slow it down but at least your fish will live.
If No3 is creeping higher please do use the skimmer as you will algae a step a head with that.