Help me

I’ve tried masterbating by clitoral stimulation but I haven’t been able to orgasm. Every time I try my legs always squeeze together and it only lasts for no more than 5 seconds and even then it’s not very strong. I’m tired of doing the same thing all the time. It doesn’t feel good anymore. I always lay on my back or standing up but the same thing always happens. How do I make the O’s stronger? Since it doesn’t feel good anymore I want to try fingering and getting inside and trying it that way, but every time I try to insert my finger it feels like pressure and tightness and I can’t go in further than half an inch. Pls help and give any tips!