Helluvalot, son.
That's death penalty in Italy.
Anyway:
Bigger pot.
More water. You can't be wrong with more water.
Spaghetti need their stirring. Really, they do.
And since we're there, we'll detail the procedure properly:
Get water. Big pot. Roughly 1lt of water per 100g of pasta. +/- 50% is not a big deal.
When it's boiling, add salt. stir.
Add the pasta.
Depending on the pasta, cook for 8-12min.
To see if it's cooked, fetch one piece of pasta, cut in two.
If the white inside it is gone, it's cooked. Taste test best test.
To prepare the sauce, we'll discuss the most simple one: Proper tomato sauce.
First, the sautè. (Soffritto)
Grab a pan, get half an inch of olive oil in it.
Get some onions, slice them, and place them in the pan with the oil. Preferably, the oil should already be hot.
Put some salt on them.
When they're golden-ish, put tomato sauce in the pan and cook it for 10-15 minutes.
Bonus points, actually make the tomato sauce yourself by boling and smashing tomatoes. It's time consuming, but it's damn worth it.