Sinjoh already created a page for "Just Go for It". You even edited it in Template:Ep when you created the duplicate page, so you can't use ignorance as an excuse. However, since the page you created seems to have the correct capitalization, I kept yours and deleted the original page for housekeeping matters.
Next time, however, please just rename the page (or ask an admin to rename it if you can't) instead of creating a duplicate. What you did could easily be misconstrued as badge editing, which is a blockable offense under global Fandom rules.
Actually, Sinjoh's original article was the correct capitalization. "For" is not capitalized in this configuration (examples: "Quest for Food", "Price for Immunity", etc.) I've restored the original article.
Distanceriez E. is correct, we do go by capitalization rules for titles, so articles (a, an, the), conjunctions (and, but, for), and prepositions don't get capitalized unless if they are the beginning of a title (i.e. "For Cod's Sake", "A Smile, Velvet Gloves and a Dagger in My Pocket", "And Then There Were Four") or if it's part of a proper noun (i.e. if a title used "The Amazing Race", "The" would be capitalized regardless of where it is in the title, since "The Amazing Race" is a proper noun).