Arduino parallel parking car - HELP

Hi, i am building an autonomous parallel parking car using an arduino for my final year project. I need help and dont know where to start off.

I am planning to use 4 IR sensors on a lego car design.

I dont know whether i would need to design a PCB circuit for this project or not, if you guys can let me know it would be appreciated.

also, is it better to use IR sensors or ultrasonic sensors?

Kind regards :disappointed_relieved: :cold_sweat:

Also, i would like to know where can i make a start, i am kind of stuck and dont know how to go about it.