Private networks are in demand by enterprises and industries. Typically, upcoming small or micro enterprises look forward to implementing a cellular-based 5G deployment for their premises. The 5G cellular network provides better mobility and security when compared with WiFi-based deployment. The proprietary core networks come with expensive CAPEX and OPEX. Therefore, several open-source 5G core networks are available for the community. This tutorial shares insight into the various available 5G open-source implementations and how they can be utilized along with the existing network deployment. A brief explanation of network services alongside a working demo will be presented. We also share a few off the shelf devices that can be customized to suit the enterprise's requirements.