Nope, you could handle it. But, be sure it's the head gasket. Check the compression, is you oil level dropping, flush out the cooling system and watch it for a bit. If it is the head gasket. Make sure you have the head checked for trueness, check the valves, guides, etc.
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.