Please don’t forget that the ‘Alex’ skin file should be in the png format! Click on the ‘Download’ button (that would be the big green one on the right side of the page). Wait for the page to download your skin and proceed to the nest step!
Type the name of skin ‘Alex’ into the search bar and press Enter button. Launch your browser of choice from the Start menu, desktop, or taskbar on the device you play on.