If you have read the docs, and have looked at the sample.cfg files, then I"m not sure what more you need. It's evident from the docs and samples that you simply define some hosts, hostgroups, contacts, services, and so on. What's holding you back?
You have your localhost call it mypc.
define in hosts.cfg all the directives for mypc.
Define in servcies.cfg ONE check for this box.
and so on.