Hi welcome!
First things first get your calf under control so you have one less thing to worry about. I only use heat lamps for kidding time if it's pretty cold out, and they are secured REALLY well so they can't catch on fire.
In goats the first thing you want to do is make sure they are disease tested and that they are negative. I use
www.pavlab.com but most on here use
www.biotracking.com. See if your friend can test them for you and if possible they can show you how to draw blood. Testing is inexpensive and good insurance.
Unless you're going to run the buck with your girls full time (I don't recommend it) he will need a very secure fence and a friend like a nice wether. If you run your buck with your does you will never have breeding dates so figuring out when future babies are going to come can be a real pain in the rear. I take mine to another farm for breeding so I know exact dates and I can plan around family vacations, holidays and bad weather.
Once you get fencing that is appropriate for goats the rest is fairly easy. Personally I would not get the goats this close to kidding if you have no experience. So many things can go wrong that could be disastrous. Ask us how we know! You should be somewhat familiar with goats before you start dealing with goats giving birth. If you decide you really want them wait until the does kid and give them 2-3 weeks to get settled into a nursing routine before you get them.
Here is an excellent website for newbies
www.fiascofarm.com. Once you have your feet wet try the Tennesseemeatgoats.com web site lots of good information but will make your head swim.
Best of luck and if you have any questions don't hesitate to ask.
Kris