congratulations to your first Mac!
Probably you only will have to connect your printer to your Mac via USB and everything else will work automatically. No need to download any driver.
Here you can find a list containing supported printers:
Hope this will help you!
Officially the Deskjet 895 is no longer supported on Mac OS X v10.6 or above:
You may try the 3rd party HPIJS print drivers by installing any of the 3 required downloads and following the Setup Instructions: