teatpuller wrote:well.....I don't profess to be any kind of exper
Well, I do profess to be an expert

Use a Weber Chimney Starter to light the fire.
For Low Slow I use 7-8 pounds of lump total, a couple in the chimney the rest in the Egg. I do not, unless grilling, fill the chimney all the way, for a low slow fire in the large BGE I fill the chimney about half-way.
For low and slow with a BGE a plate setter is essential, you will have to experiment with vent settings to achieve L & S temps. With my large BGE I've held stable 250 temps for a 10-12 hours without the addition of charcoal. The one thing I had to get over with the BGE is my aversion to closing the top vents, you will need to close the top vents a bit to keep in the 250 range.
Wood wise, use two fist size chunks of wood, after your rib cook adjust wood usage to your preference. With a little practice the BGE's are easy to use, very stable, though you must use a plate setter with the Big Green Egg to successfully use it in Low Slow mode.
Give the spare ribs a simple rub, no sugar, I am not a fan of sugar in rubs, especially for the novice.
Simple Rub3 tablespoons kosher salt
2 tablespoons freshly ground black pepper
1-1/2 tablespoons paprika
2 teaspoons garlic powder
2 teaspoons onion powder
1/2 teaspoon cayenne pepper
Start ribs bone side up, flip meat side up after an hour and a half. Give you self at least 4 hours of smoking time, though the ribs may take less, or more, time. Add an additional 45 minutes for starting the fire and getting the BGE up to speed.
If you plan on saucing/glazing ribs wait until they are almost done as most BBQ sauce contains quite a bit of sugar.
Its difficulty for the novice to tell when ribs are done, use tongs to pick up one end of the rack, holding the rack about four ribs in. If the rack bends and flexes a bit and looks as if its about to crack or break, a toothpick should slide into the meat easily.
Baby Back Ribs on Big Green Egg
Spare Ribs on BGE
Enjoy,
Gary