This process is explained in the Apple documentation.
https://support.apple.com/

Then, you must share the folders that you want to explore.

This step is also described in the Apple documentation. 
https://support.apple.com/

And, using Zappiti Player, select your Mac, enter your credentials when app ask it and you should be able to explore these folders.

Note that last Mac OS versions are not compatible with first version of Samba (SMB). To get around this problem, you can use the tips described here :
https://zappiti.uservoice.com/knowledgebase/articles/1152205--network-smbup-access-to-your-mac-from-your-zap