I'm just some young bean who thought to myself one day, "Why can you just tell CGI is being used in movies, and what makes something photorealistic?"

So I'm young, still in grade school, but I'm interested in learning how to create realistic digital models. Coupled with this is the fact I'm new to Blender, so while I try to find information on Google and Youtube as much as possible, there's still a lot of stuff I don't know and don't know where to look.

I bet a lot of my questions'll be dumb stuff most of you guys know right off the bat. But even if you roll your eyes and think, "How the heck does this kid not know this?" I'm still grateful if you take a quick minute to answer.