Heres how to connect to multiplayer,
Instead of hamachi use radmin vpn, imo its better,
next the person who is hosting creates a network and the others join that network,
next withing radmin copy your ip and share it with your friends,
all your friends have to do now is to type that ip ingame and connect,
if it isnt working then click start and search up Windows Defender Firewall, then on the left hand side click turn firewall on or off then turn both options to off,
doing this should fix your issue