A cordial greeting to all, I do not want to reiterate in each post apologizing for my bad English.
I would like you to explain how to create a file to replace (in this case I would like to replace armors).

I would like to be told where I can find a tutorial that is simple for the most novice users or someone to make a tutorial for people who start in this world for the first time.

Again, a cordial greeting to all.

Welcome! If you want to replace the armor from the NPCs, the easiest way to do this with leveled lists, which prescribe the desired armor. As an example, you can see how it is done in the mod Modern Firearms by idlesheep. It replaced almost all of the combat armor and synths armor.

I still do not quite understand that. But thanks for answering.

I'll try to explain in more detail. But excuse me, English is not my native language. All items that appear at the NPC, specified by Leveled lists. Armor, weapons, medicines. Here's an example Leveled list for raider boss outfit. FO4Edit using.

It is seen that the change in the level of the NPC changes his clothes. And if we want to replace the armor for this NPS, it is necessary to change this list. Then all the new NPCs appearing in this class will have new armor. But only newly formed. In order to change the Leveled list, you need to make a patch file, which will override vanila Leveled list. YouTube should be a video how to make a merged patch, you can use as an example. The principle is the same.