You can either shear your alpacas by yourself if you only have a few fiber boys, but if you have a large population of alpacas, it would be best to hire a professional shearer for help. Shearing is also a good time to trim their toe nails, worm them, give them shots and possibly do a little tooth cutting if it needs to be done again. To make the shearing process easier it helps to have your alpaca halter trained and have had them been handled some before so they dont freak out as much.
Shearing can be done on either a shearing table/mat that is on the ground, with someone holding down the alpaca, someone shearing and someone collecting the fleece. Or you can do it with the alpaca standing up and tied to something, someone holding the alpaca still and other people shearing and collecting fleece.
You want to start by choosing laying them down or having them stand up. If doing it yourself you want to make sure you have a good pair of clippers, I bought mine from Jeffers Livestock supply. You also need to have garbage bags to put the fleece into, a couple for each animal because you separate the main body fleece from the legs, also having a marker and tape to mark the bags with is helpful to keep the fleece seperate and you know who's it is.
When shearing if it is you make sure you dont make any fast movements, and have the other person holding the alpaca hold them as firm as possible so the alpaca does not jump or move so the person shearing does not cut them.
After shearing, go ahead and trim feet, check the mouth to see if teeth need to be cut, worm them then sweep the area, clean up any messes they made and bring in the next alpaca