Ok, kind of complicated subject, but I have some experience, so I will try and explained in brief.
The people you are dealing with, in general fall into a number of categories.
bullshit artists, wannabes, wind up artists, users (as in manipulators) and the real thing.
The potential relationship deals breakdown in to, all in part parent, intermittent contact, virtually no contact and no contact at all.
The method of conception breaks down to AI (artificial insemination) or NI (natural insemination “sexual intercourse”)
Your mission if you decide to accept it, is to find your way around through the maze of possibilities, to find somebody acceptable. That hopefully really has similar ideas or principles that are acceptable. To come to some kind of agreement. Then to arrange some form of meeting, which in one way or other ends up with you being potentially given a sperm donation which hopefully results in pregnancy.
That’s pretty well everything in an egg shell. Of course it’s not quite that simple in reality “normally”. 😆 🙄