I don't think anyone here is likely to attempt to explain the whole topic of electric fields to you. It's too much to ask.
The book I have here in front of me takes 14 pages and 25 diagrams to do this.
It would be far better to start by posting a problem here that you need help with, saying exactly what you have done and understand and then where you are stuck and what you don't understand.
There are plenty of people on here, myself included, who will help you.