Purchasing Note 5 -Answers needed

Hi everyone,

I am buying the Note 5 soon and hope to get some answers for some of my questions. I am buying the 64 GB version of it.

1. What is the estimated available amount of storage space available after all the pre-installed software?
2. What is the available amount of Ram that i can use?
3. What are some of the things that I should take note when buying the phone?
4. What is the best way to conserve storage?

Anymore questions that I have after this, I will ask again.

Thanks a lot