Update your system and install the necessary packages:

sudo pacman -Syu
sudo pacman -S --needed base-devel git

Clone the yay repository: 
git clone https://aur.archlinux.org/yay.git
 

Change to the yay directory and build it:
cd yay 
makepkg -si 

Now you can install packages form the AUR with the command yay -S package_Name 
Just like you would with Pacman.

Yay commands:

Install the packages with:

yay -S package_Name

Search for  packages with:

yay -Ss package_Name

Remove packages: 
 yay -R <package_name> 

Upgrade all packages:
yay -Syu 

Clean up unwanted dependencies
yay -Yc