Use fresh onions, fresh garlic, fresh tomatoes, bay leaves, oregano,salt, pepper, ... good spaghetti sauce comes from scratch.
Ragu? Prego?
Its a sad sad day when people see canned sauce as quality.
Ground Beef is great, but lamb meatballs... mmmmmm... *drool* Just swap out the types of beef. The recipes require some tweaking, but you should start with a base recipe and see how it is once its all done then modify it from there.
Also, you might want to do a little research on different spices and how they modify the taste of a recipe. How different starches and sugars within certain things will change the consistency of your recipe. Consistency is important. The best example I can think of is peaches within peach cobbler. If you use frozen peaches the peaches will be all deflated and blah, but fresh peaches mmmm then they peaches are firm. Tomatoes are the same way sorta. Preservatives are nasty and shouldn't be used. Canned tomatoes are OK, but homemade canned tomatoes or tomato paste is good. Its easy to make but requires a great amount of patience.
MmMmMmMm thinking about this makes me want to cook some. I'm going to go make some.
Also, as a last thought 24 hours of cooking isn't really needed. I think that a Crock Pot all day or night makes it pretty good. For your starting you should try just toying with shorter recipes so you get used to what will work.
You should give us some feedback. Let us know how it goes. What recipe you used, what you thought, etc.