i need Help plz (hackintosh)

i wanted to try Hackintosh on my old computer it's dell optiplex 3020 desktop domputer (intel Cpu i5-4590 igpu intel hd-4600) but i have no experience i tried the Opencore method i tried creating file EFI from scratch and it couldn't boot so i decided to use EFI ready files and i had the same problems i want to understand why this happend plz anyone has time to help me step by step i would be grateful thanks