This book contains many details, not all of which may be relevant to your situation. You do not need to read every word before sharing files, but you should be familiar with the overall process first.
Prepare to share files:
Before you think about the big world of sharing files on a network, you may wish to review techniques for sharing files among users on a single Macintosh. See Share Files on the Same Mac (p. 6).
Learn how file sharing is different from using disks to copy files from computer to computer or using email attachments to move files around. See What is File Sharing? (p. 8).
Review reasons to share files, and see which match your situation. See Reasons for File Sharing (p. 11).
Decide on the hardware ...