How do I wire 6 recessed lights to 1 dimmer switch with 12-3 power wire source and 12-2 to between the 6 lights and then using 12-2 witing to the single pole switch?--need your help please

In that configuration it can't be done. Putting the switch electrically after several lights is a pain and should be avoided.

Run the feed to the switch, then up to the lights. Use 2-wire for everything.

If this is even what you are saying. It is very hard to understand what exactly you are trying to do.