Help with cervix placent

So just wondering how to tell where my cervix is at? I read all the info about what it is supposed to feel like and about reachability but I'm still not sure. So when I checked it before bed, I had to pretty much put my entire finger in to reach it so would that be considered high? I just have nothing to compare it to right now. And about the opening, I can't tell if it is closed or open but I would describe the feeling as lips soft. Is it really obvious if it is open or closed? I just put medium.. I'm just wondering.. I'm 10DPO