How to get my Wi-Fi connection on my iphone? PHOTOS?

I clicked on "Forget this Network" on my iphone, so I don't have Wi-Fi anymore… My dad's away in the Philliphines and won't be back soon, and he usually deals with the Wi-Fi thing… No one else in my family knows how to fix the Wi-Fi problem…
USUALLY, to get Wi-Fi on your phone there's a username with a password, but there's a "security" too? There's like 6 choices, and I don't know which one to check. HERES THE PHOTO! V
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(Sorry I had to do it on paint because my phone can't snap shot)

Watch out this video it might help you out

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