2004 Honda Odyssey, 140k miles, SparkPlugs

I guess this is a motivational post as much as a service and repair question. Here it goes.

My Honda Odyssey has 140k miles and I’m pretty sure it still has the factory spark plugs. I know, I know it’s bad. The good news is that I suspect that it might not be so bad. Lots of highway miles, little corrosion on other parts of the engine. Stuff like that gives me hope. How bad do you think it will be? I’ve changed plugs before but never at this high mileage.

Here’s my plan, let me know if you think this sounds right.

1. Cold engine, early am.
2. Take the coils out and spray some pb blaster down into the spark plug wells.
3. wait
4. Take a sip of coffee, cross fingers.
5. Take the first plug, push CLOCKWISE a touch, then COUNTERCLOCKWISE.

Hopefully it all works out, but the next part of the question is what do I do if I break something?
I didn’t see a video on this.

Thanks!
Ivan