In a single word: YES! I get the impression that most women feel like they have to do certain steps together (like foundation + concealer), but that's a total myth! In fact, I myself almost never wear foundation, and instead use concealer just where I need it... like under my eyes, on any redness, and on any breakouts that happen. The only thing you need to do is make sure you blend the concealer until it looks like it's a part of your skin rather than sitting on top of it, and you are good to go. Don't let YouTube fool you! You do not need to wear a whole drawer full of makeup products together in order to look great. Do what makes YOU feel comfortable!