I almost burned my house down.
That's so scary. How and why did you almost burn down your house?
I was playing with matches indoors.
You should be more careful with matches. Only use matches when you want to quickly light something.
I want to know what it's like to burn my house down.
It's not good to play with matches or flammable items in your house as the risk of the house burning is severe and that would be awful. Wanting it to burn is concerning and if you have these thoughts you should consider talk to a professional, as your feelings could be dangerous. Please be safe.