This is a readme file for installation instructions on where to put the files when you extract them
You can either download the ReadMe or just read here:
Installation Instructions for the Campaign:
Extract all the files from the archive and Drag and drop them into your Tib dawn local custom maps, as an example, my path would be:
"Documents/CnCRemastered/Local_Custom_Maps/Tiberian_Dawn"
GDI Campaign is a lot easier than the Nod Campaign.
Missions were made assuming the game is played on normal, if you play on hard then I expect you to have a miserable time of it.