Prostate Orgasm

Hello, So I have been trying to get an orgasm from prostate but no success so far the closest I have ever been was getting a little tickling sensation. I usually use a dildo and have tried several positions like riding it using my hands to gelp navigate it. Sticking it on wall and humping it but no success so far. I am thinking to try again today but need to know what I should be doing and looking for.

Please share your experience how you achieved it and how it feels and how ik that I am doing right

Thanks