You'll also need to buy sheep hurdles or build a race in order to round them up.
If you know any local people who will help you to start its money with paying. We used to pay someone to vaccinate them, drench them, shear them etc so we could learn.
I find it an expensive hobby to start. And if you are going in to lambing then you also need to think about indoor or outdoor, and make provisions.
Maybe you could start small with some store lambs which you just fatten up - no overwintering costs etc.
Re worming, it depends on where you are. And conditions. For instance we used to fluke 3 or 4 times a year but have has casualties due to wet weather so it'll be more often now .
My vet bill for one flukey lamb, now dead, was about £200 with one vet call out and another to put down, plus meds. But then I'm very soft with my sheep
J xxxxx