Diva cups

Okay ladies I got a diva cup (its actually called the dutchess cup cause it was cheaper, I got the smaller size) but I need advice! I feel like a middle schooler trying to use a tampon for the first time! I started my period yesterday and I tried to use the cup this morning and couldn't get it to open all the way from what I could tell. I folded it like your supposed to. Maybe its because I'm a newbie, maybe its the way my body is and there just isn't room? TIA!!!