Files with Mc formats such as McWorld, McTemplate, McAddon, and McPack have the same way of installing them, here are the steps
1. First, open the download section where you download the file
2. Click the file and an option like this will appear
3. Select and click the Minecraft icon
4. Will automatically open the game Minecraft and import
5. After success, you can check it in the World section for McWorld, Global Resources section for McAddon and McPack, and in the World section for McTemplate
To install Zip files, here's an explanation
1. You must have an application to extract the zip file, as an example we use ZArchiver
2. For McWorld files you can extract the contents folder to
Games> Com.mojang> minecraftWorlds
As for the McTemplate file, you can extract the contents folder to
Games> Com.mojang> world_templates
As for the McAddon and McPack files, you can extract the Behavior Packs section to
Games> Com.mojang> behavior_packs
and the Resource Packs section to
Games> Com.mojang> resource_packs
3. Enjoy