Can anyone send me specific info on how to install new timing belt. trying to do this myself. It would greatly be appreciated.

 

Searching the archives is a great way to find what you need. Top right corner, bold red letters, type what you want and click "archived content" to the right.

https://honda-tech.com/zerothread?id=649277
z6 and y8 are no different, in this regard

 

turns out the timing belt is almost new and checked out fine. car starts right up but still doesn't explain why there is a knocking coming from inside the valve cover.

 

No a timing belt would not cause that.
If its more "tapping" than "knocking" (because thats a specific thing) you need to do a valve adjustment / adjust your valve lash.
Search for the how-to, as i described earlier.

edit***
forget it, i'll just give you the thread
https://honda-tech.com/zerothread?id=1305086