Suggestion to make a private 5G network

Hello, I am thinking of making a private 5G network: one new 5G gateway, three devices (laptop and raspberry pi) can exchange using the wireless signal of the 5G gateway. From what I see, the SixFog 5G Development Kit seems to be a good candidate for the 5G gateway, so I only need three SixFog 5G antennas for the three devices. I have four questions: (1) Am I right? (2) Do I need any further configurations? (3) If yes, could you publish a tutorial or have any suggestions to do this? and (4) Can my 5G telephone connect to my 5G private network? Thank you in advance for your answer.