Can't choose on Emulationstation main menu

[pdelaney]

Apologies if this has been asked or covered. I'm always a total novice. I've followed the First Installation Guide from retropie.org.uk, but when I boot for the first time I don't get a menu of emulators to scroll through; but a screen with "Retropie" across the middle with "configuration" underneath. The options at bottom tell me to press "A" for select etc, there's an image of a D-Pad which tells me to choose, but I can't scroll to anything.

Thanks

Setup:
PI Model b+
Universal power supply 5.1v
Retropi v4.1
Built From Pre made SD Image on RetroPie website
ACER USB keyboard)
Pihut usb game controller
Installing for first time guide

I have tried to update everything and got an error saying "could not successfully build emulationstation"

Thanks for your help. 

[lostless]

The emulators don't show up until you add roms for a perticular system. Since you don't have any roms, you only get the retro pie config menu

[pdelaney]

@lostless legend! Thanks mate, sorry for being so daft!