You have been getting some solid advise from Simon.
To answer your question above.... if you are cycling the tank, there is no need to change water in the tank daily (if there are no inhabitants) , not until the pH reaches below 6.5. If you can keep it at pH7.0 during the entire cycle process, then the bacteria will grow at an optimal rate. The time when cycling is complete, is the time you start adjusting water parameters to suit your selected shrimp.
The cycling process will naturally reduce pH, so that is why you want to keep an eye on the readings during the process. Don't let it drop too low.
There is also no reason to NOT add your plants now.