Hello!
I would like to help you with VPN configuration. Can you explain me your goals? Do you have those 3 computers in office and want to make access to office from homes? Or do those PCes are in different locations and you want to make communication between of them?
About my experience: I have big experience with network administration (VLAN, SNAT, DNAT, iptables, iproute2, multiWAN, tcpdump...). Big experience with OpenVPN servers/clients. Serial connection 2,3 servers for more security. OpenVPN over IPv6 and other.... Experience with VMWare ESXi, MS Hyper-V, Proxmox VE, Mikrotik, Ubiquiti and some different skills.
My other skills and reviews you can see in my profile.
Hope for cooperation!
Thank you!