The one in the middle is a Choisya, Sundance. I have one in my garden I took as a cutting when a friend was pruning hers.
General cutting guide,
If you can get a place where a smaller branch comes off the main stem and tear it off, then trim the thin bit of bark to leave a shape like the print of a heel this is called a heel cutting and is generally good. If it is not possible look for a bud and take from just below it.
Using rooting hormone ups the success rate, as does non hormonal rooting powder mixed with the compost, that is usually sea weed extract. A bit of sharp sand in the mix also helps rooting. If it is not sold as horticultural sand it is a fraction of the price, but wash it through in case it came from salt water.
When you prepare the cutting it can pay to take off some older leaf, it cuts down evaporation.
Most cuttings think something almost the thickness of a thinish pencil and about nine inches, but there is plenty of variation, willow think about 6ftlong by 3/4inc diameter, and make a hole for it with a crowbar.
Good and wet in the initial stages is usually good, it has no roots, but still has to support the foliage
Put in more than you need, some may fail. If they all work you can give them away.