Hello lyric!
Good questions here's the best answers I have
I do shear my own sheep occasionally. I sheared them all myself for the first few years but now that they are making money for themselves I do indulge in the professional shearer now and then to help me with the time factor. But I do like to keep my edge and so I usually shear a few.
Doable is a subjective term...
but for the most part with the right materials and attitude (both yours and the animal's) it is a task that most anyone can accomplish. However, some words of advice from experience:
Do not plan on getting your first shearing session done within a timely manner. Whatever length of time you think it's going to take add at least an hour.
Do plan on shearing just one animal at a session until you become proficient. Pressuring yourself with multiple animals at a time will elevate stress levels in and you and subsequently the animals and will lead to mistakes.
Do consider your animal's temperment: are they a pain in your backside or do they roll over and pur when you see them? Do they mind being touched? There's going to be a whole lot of uncomfortable touching involved.
Do plan on worst case scenario (not that it will happen but just in case) and have some suture materials and blood stop powder handy. In all the times I've sheared I've only had to use blood stop for nicks nothing huge!
Do have at least one other person with a good back there to lend a hand. It's amazing how hours of bending over an animal can weaken a young spry person let alone someone not so young and spry.
I'm most familiar with sheep but I have a llama too and have tried to shear the bugger unmedicated once (from now on I shear when the vet comes and knocks him out for vaccinations and yearly check ups.) and what I've appreciated the most is having the right set of shears and the right type of restraint. For the record, I have tried restraints on the llama and that did not go well!! He's a biggun, does his job well and likes to be left ALONE.
I started out with kitchen shears (yeah, I'm that determined) when we had no money and no way of obtaining anything better. I tied them to a post and battled with them and the shears for five hours! Two shorn sheep and a sense of accomplishment later I'm glad, relieved, excited that I don't have to do that ever again.
Now, last but not least. Alpacas are a different animal altogether from what I have experience with. So as with all advice, take it for what it's worth but don't hold me legally accountable should some of prove to be untrue for you!