If this machine is going to be on the Internet, you must know its network configuration before starting. If your network has DHCP, you’re all set. If not, you need a valid IP address, netmask, default gateway, and name server IP addresses.
Decide in advance if this machine will run the X Window System. Generally, desktops run X and servers do not.
At this point, you have all the background you need to install OpenBSD on i386 or amd64 hardware. Break out your equipment, and let’s get started.