welcome!
You might try some books from the library for beginning quilters. The ironing is just to smooth things to make it easier to put together. Do not open the seams as you would if you were sewing garments, but press all seams in one direction so when you put pieces together, one piece will have the seams to the right and the other piece will have them oposite -- the same number of layers on each side, but it is easier to match seams and smoother in the finish.