What do I need to do differently?

So I’ve been trying to have a prostate orgasm without touching my penis, and it is so hard to do. I desperately want to be able to cum from only prostate play as I hear it one of the most intense pleasurable orgasms. Ive been using a dildo and I can hit my prostate. It kind of feels like I have to pee when I’m hitting what I think my prostate is. Unless I’m really hitting my bladder? I can begin to leak precum but I can never get to a full orgasm.

I’m using a dildo, can’t remember the name. But it is rather stiff/hard with a slight curve. Should I be using a softer more flexible dildo? Should I be riding it instead of on my side? Do I need an entirely different toy?

Any tips or tricks you have would be greatly appreciated.