Look up netwoirking first before trying anyhting.
Your best off with a render manager, Smedge is a good one but theres dr que and spider that are pretty good too. They all require the software to be on the other machines, and give you the options to use the different renderers ther eoff (and other softwares too)
They all need quite a bit of fideling with to get going but are well worth it. But TBH I would just use either the desktop or the laptop (whicever you dont really use) for rendering and just use that, that way you can keep working on the other. Render frams are great when youve got a few PCs to use.
"No pressure, no diamonds" Thomas Carlyle