Does anyone know how to take apart this hub to do a single speed conversion
Assuming this is a standard freewheel hub there should be no need to disassemble it, since you can simply remove the freewheel and install a single-speed freewheel made for this replacement process.
To remove the old freewheel you generally need a freewheel tool that matches the existing freewheel's design.  There are a half-dozen different schemes for this, depending mostly on the brand of the freewheel, so you may need to visit a bike shop to get an exact match.
If you really want to disassemble the hub itself you do it one nut at a time, starting from the outermost nuts and working inward.