Can someone please explain how to achieve prostate orgasm?

I was recommended to visit here.

I already know how to locate my prostate and have a prostate massager, but i still couldn't get it.

What do you do after inserting the toy into your butt? Do you squeeze your butt like doing kegel? Push the toy like how you poop? Or just do nothing?

I need a detailed explanation on what to do and what feelings to look for T^T