You will probably need to make Sforzando detect your keyboard.If you don't already have it, I recommend getting 7zip. If your Piano in 162 came in a zip/rar/7z or something that is not a.
Install Sforzando and run the standalone program.Download Piano in 162 (the best free piano according to a bunch of people).
If you're looking for free piano (in case you don't buy the interface for example): If you get addictive keys, you can get started. (make sure you make an account on their website first). Typical recommendation is the Scarlett 2i2. If you can afford the focusrite audio interface, you can skip most of the problems and just buy one. Pianoteq is basically as good you can get in realism, which is especially important when playing.