Plumerias are not always the easiest plants to start from cuttings. Some varieties are easier than others. Some will just sit there and eventually rot, unless you have high heat, light, and humidity. And, most can take from two to four months (during warm weather) to root. I do not want to discourage you, just let you know that this particular plant can be tricky. If rooting inside, you'll probably need heating cables or a heat mat. Inexpensive generic (yellow, white, pink) cuttings as well as seeds can be purchased on Ebay.

There are probably a lot of good pictures to be found of rooting plumerias online, if pictures will suffice.

Try visiting Plumeria 101 to get more info.

Here is a link that might be useful: Plumeria 101