I want to properly take care of my skin barrier with a skin barrier cream.

Lately, my skin has become so sensitive and red so easily that I feel like I really need to use a skin barrier cream.
But honestly, I'm wondering if just applying cream is enough, and I'm confused whether I should use it with a toner or a serum.
I'm not sure if I need to consider things like ingredients, formulation, and absorption when choosing a skin barrier cream, and I'm also curious how many times a day it is most effective.
I've heard that using a skin barrier cream suited to my skin reduces breakouts and improves hydration and texture, and I'm curious if that's really true.
Especially during this time of year when the seasons change, my skin seems to become more sensitive, so I have to pay attention to so many things, from choosing the cream to the order in which I apply it, that it makes my head spin.
Some people say it is good to apply toner first, then serum, and finally cream, but I'm not sure if that routine works for my skin.
I am also wondering how many times a day I should apply it for it to be effective, and I would like to know if I need to apply it morning and evening, or if I should adjust it depending on the situation.
I think it's important to find products that suit my skin. I would feel much more at ease if I could get recommendations, but I'm also worried about making a mistake when choosing a product.
I would like to know if it is better to use the same product for a long time or to switch it up according to the season or my skin condition.
I've heard that consistent use of skin barrier cream reduces breakouts and improves skin texture, so I'm curious if it will really work on my skin.
Honestly, just the thought of having to take care of every single one of these things to create a routine makes my head spin and feels like a hassle, but I still really want to manage it properly.
So I keep thinking how great it would be if someone could recommend products and a routine sequence that suits me.
Ultimately, I think I would feel much more at ease if I could get recommendations on what to prioritize when choosing a skin barrier cream and which ingredients or formulations suit my skin.