What are the procedures I need to go through to obtain a British passport?

I’m a Canadian citizen but my father was born in England. What are the proceedures I need to go through to obtain a British passport? I hear that it costs tonnes of money and it’s really a pain in the a** to go through.
Has anyone done this before? I’ve tried looking it up online but find that I go in circles and there are never any answers as to how I go about getting it. I don’t even know where to begin! Please help!