Parallel parking

I’m learning how to parallel park since I moved from the suburbs to the city, but one thing I CANNOT get over is overestimating the hood of my car and the rear of my car

I think the hood / front of my car is so huge and that it’s going to hit everything and I think the rear is huge too even though it’s not that bad

What are some good reference points to know that the front of my car is not going to hit the car in front? And same w the back, like when the car parked behind me is far enough from my rear