This is the format used by the kml file - note the "back to front" co-ordinates
<Placemark>
<name>JGRLoit Home</name>
<description>Hexham.</description>
<Point>
<coordinates>-2.1049,54.96860,0</coordinates>
</Point>
</Placemark>
Bear in mind that you might want to add an "approximation" to your location rather than showing exactly where you are. Google Earth shows exceptional detail in places.
Well, that's 3 of us on the map now!