You could always just turn right. There is no "main direction."
The entrance plaza and archway frame that direction as the "main entrance", like MK's Main Street, Epcot's SSE, DHS's Hollywood Blvd, DAK's path to the Tree of Life/Discovery Island, and IOA's Port of Entry.
Once inside the archway, instead of being presented with a sculpted, picturesque vista like all the other parks, USF greets you with some gift shops and a street that's a total hodge-podge of aesthetics and themes. There's also a lot of visual clutter that does not compliment each other. For this reason USF has the worst park entrance of the Orlando parks, and I think this only makes it worse by detracting further from the "soundstage" theme that the Minions are taking over.