Hi, my name is Neil, I'm an independent adviser and a Windows 10 user like you.
To download the Epic Games Launcher, you can go to any Epic Games product site like Fortnite for instance and then click the Download link in the upper right corner.
Here's the link: https://www.epicgames.com/fortnite/en-US/home
Next, choose how you want to play (PC/MAC) and then choose how you want to sign up, or you can sign in if you already have an account.
After signing up or signing in, the download for the Epic Games Launcher will begin automatically.
After downloading, simply find the downloaded file and click on it to install the Epic Games Launcher.
I hope this answers your question. Please let me know if you need any further help.
Kindest regards,
Neil