Is there a specific order for a basic skincare routine to strengthen the skin barrier?

Lately, my skin has been feeling tight and turning red frequently, so I keep thinking that I need to strengthen my skin barrier.
But actually, I have no idea where to start.
If there is a product that helps strengthen the skin barrier, I want to know not only the ingredients but also the actual usage method and order.
It is still unclear in what order to combine toner, serum, and cream to properly strengthen the skin barrier.
Especially when the skin is sensitive, one also worries about what order or method can be used to manage it safely without burdening the skin.
I am also wondering if I need to change my routine every season, and what I should pay more attention to in dry weather like this.
I've heard that consistently strengthening the skin barrier reduces breakouts and sensitivity, and makes a difference in skin tone and texture, but I'm worried about whether I'll actually be able to feel these changes on my skin.
It is confusing what to consider first when choosing a product, and how to determine the combination and order of ingredients.
I also want to know if simply applying just a cream is enough, or if I need to create a complete routine that includes serum and toner.
I tend to think carefully about my choice because I worry that if I don't properly understand my skin type and condition, it could actually cause breakouts.
Ultimately, I would feel much more at ease if I could hear advice from experts or those with experience on where to start to strengthen my skin barrier and which products and routines to choose for the most effectiveness.
I hear that consistent care improves skin texture and reduces sensitivity, so I really want to take proper care of my skin, but there are many times when I feel at a loss as to how to start.