I started reading threads on this website very early in high shool and I learned a lot of valuable information that applied to any stage in life but also mentally prepared myself for what I should expect for recruitment when I was older. Now I am a senior and finally made an account knowing what school I am going to so that I could ask more specific questions. So my personal advice would be to continue reading threads but you probably don't need to start asking specific questions until you know what colleges you actually get into