How do you start wearing makeup for the first time?

I'm 23 but I don't know how to apply makeup. I'm just starting my career, and since makeup skills can't improve overnight, I want to start slowly. What should I do?

To begin with, I had absolutely no experience with makeup during my school days, and since I had a lot of acne, I only use cosmetics for that purpose. I buy the Isoi Emergency Spot Treatment every year; it costs about 14,000 won per bottle, but I use it because it’s good for acne. However, I use so much of it that I buy it about three times a year. As for face masks, I find that using the vegan ones for the expensive ones, or the 500-won ones from places like Daiso, works well.

I'm planning to buy other cosmetics as well, but I don't know what to buy first.

I'm basically just using the toner, lotion, and face mask that came as freebies. My skin type is combination, and according to a free personal color analysis I got for job hunting, I'm an Autumn Warm tone and have oily skin. I tried using some other oily cosmetics I bought by chance, but they didn't suit me well.

Also, if you have a beard or mustache, you can shave that off with shaving foam and a razor, and so on. As for the makeup, if you are concerned about your skin being yellow, I think you just need to do your eyes and eyebrows.