vagina question???

ok so, I'm sorry this is so weird but I need answers LOL I tried fingering myself and it feels like there's a walk there?? like a barrier?? idk if I make sense but I've never been able to finger myself and I've never used a tampon so idk if I'm just doing it wrong or I'm too nervous and clenching but it feels like it doesn't want anything up there idk pls help