Wearing makeup is not just for when you go out. In fact, you can wear it everyday at work (or school). Adjust the way you wear it according to the type of work you do. For example, a minimalist makeup is better if you have a more formal job. In this case, you can invest in a good quality waterproof mascara, a thin eyeliner, a bronzer or a highlighter and a nude lipstick. If you work in a place where you are free to wear what you like, why not invest in some bold lipstick colours and go for a thicker eyeliner?
The key is not to go overboard. Keep it classy and, most of all, feel good about yourself.