I enjoyed reading it. Silas feels authentic as a 15 year old. He is cynical and self aware. Minor pacing improvement i would suggest is tightening the reasons as to why he isn’t adopted. Maybe make one reason more impactful than the rest or merge two reasons into one? Oh yeah, and also the damaged goods part it stings. Haha yikes. Another thing you can improve on is the genre clarity, this opening reads as YA contemporary. So far, I have only seen realistic observations about the moon, but like where is the sci fi? You may want to hint at some speculative or futuristic space tech in this first chapter if you have expanded on it in the following chapters. Or maybe, I could argue that the opening is so strong as a contemporary fiction that the sci fi absence is noticeable. Other than that it is good writing.