Write a short story about a main character who undergoes a change or learns something

About six years ago in the small town of Union Springs, Joshua and I had one heck of an adventure. It all started because of this old creepy house that was behind our own. We were only nine and 12 years of age; my brother being the oldest. This being said, the curiosity of a youngster began to set in. For years upon years, we stayed clear of this house. At night, the house made scary noises as the wind blowed through the broken windows. One night, my brother walked into my room and told me with a confident voice, "I got a plan to get into the house." The next morning, I heard Mom and Dad talking about visiting their sick parents. They told Joshua and I that they were leaving for a day. We thought nothing of it; mom usually left enough food for us to eat on for a day. Besides, this was not the first time we stayed at home alone. Hours after my parents left, I heard my brother in my dad's closet. I asked him what he was doing he said, " I am getting prepared," and he was getting a gun. I rushed into my room and got my switchblade; I told him that I was ready. So we began to walk to the old, beat up house. We knocked on the door like two idiots, even though we knew nobody stayed there. Joshua kicked the door down, and a gust of cold wind hit our faces. We began to look through the house, and suddenly, we fell through an old wooden floor. Believe it or not, we landed on over $500,000 of cash. Shocked out of our minds, we started rolling in the money and throwing it into the sky; what any youngster would do. It turned out that the house behind us was a drug house of money. Who knew, but the story is not over just yet. Soon after, we suddenly heard a car pull up in the driveway of the house. Two gangster-looking type of guys slowly got out of the car. One with what appeared to be an empty sack. "Could it be that they are coming for their money," I frantically asked my brother. He slowly pulled out my dad's AR-15 from behind his back and cocked a bullet into the chamber. "Yeah, man it looks like they are," my brother said. My brother was always a fast thinker; he always was four plays ahead of you. So, he told me to run out the back of the house and call the cops. So, I ran as fast as I could without being seen by the two crooks. About five minutes later, I heard rapid gunfire coming from the house. I began to run to the house frantically, hoping it was not my brother. As I opened the door, I saw, on the floor, the two crooks were dead. Seconds after the cops came and told us that they were on these guys trail for over two years, my brother told them that they shot at him first. Also, that we discovered $100,000 under the house. Moreover, to make a long story short, we walked out of there $400,000 richer. Don't ask me how he did it; I just knew that he always thought ahead.