Reddit is a forum based website where anyone can talk about anything and everything. I learned a lot about skincare and makeup from one of the subreddit (which means sub-category) because I feel like sales associates from retail store tend to up-sell their own brand and not really helpful in terms of catering one's skincare needs. So I go to this subreddit to read the latest skincare/makeup news or about ingredients instead of staying loyal to a brand unless it really works for my skin. Skincare is so personal to one to another and I feel like there is no one good answer.

In other hands, you can find any interest of yours on Reddit and learn/chat with other people around the world. Just be careful on what you write there; not everyone has the same sense of humor as you for example. Stay humble and enjoy the community!