'insertation' for girls

i have tried to put a tampon in COUNTLESS times it only ever gets in like 1cm if im lucky. I also cant put anything else up there to masterbate :( i know NOT to stik stuff up there straight & that u hav 2 do it on an angle but it still NEVER WORKS! i thort that if i can get atleast 1 finger even just my pinky up there and feel comfortable about that then i should b able 2 do a tampon. (i live in australia which means i hav pretty much NO selection in tampons the only applicator ones are super absorbancy which is does not suit my flow i dont want TSS so i can only get non applicator tampons)