What criteria should I use to check my skin condition these days?

As seasons and lifestyles change, my skin condition seems to change as well, so I've been feeling the need to check my skin condition these days. Even if I don't have any major skin problems on the outside, subtle changes like tightness or roughness seem to be only noticeable through skin checks these days. I'm wondering if I should check my skin tone, elasticity, and sensitivity in addition to simply checking oiliness and moisture levels. I'd like to know how I can check my skin condition at home, and how I can adjust my skincare regimen based on the results. I'd like to hear a detailed explanation of whether regular skin checks are actually helpful for my skin care.