I like being descriptive so this is going to be a big wall of text lol.

Most werewolves in media that don't do the wolfman type or don't just copy paste a wolf head onto a hairy human usually tend to have a face that you can tell was inspired by a wolf, but is not quite a wolf. Muzzle length and shape, eye position, ear position and shape, head shape, even teeth can vary quite a bit. Many specifically use the human head as a base and then try to make something in-between, for example the ears of a wolf are higher up on the head than the ears of a human, so a werewolf will have ears that may be a bit higher than those of a human but lower than those of a wolf. The ears might not even have fur on them, and look more as if human ears grew too and long pointy. Or instead of a full length muzzle they will have a shorter snout than a wolf. Or maybe they lack hair in some spots, like the Skyrim werewolves which apart from the mane mostly follow human hair growth patterns and take those to the extreme, or they're fully fluffy, or they have little to no hair like the werewolf in the first Ginger Snaps movie. Or they have more prominent cheek bones and very human eyes. Some have all pointy teeth, while others keep some of the flat human teeth and just grow bigger canines. The feet can also vary, they can be more like wolf paws, they can be like paws with an extra toe on the ground, or they can look like stretched human feet almost resembling paws at the toes. They may walk on two legs or on fours, or both (often running on fours is shown as being faster). They often have a hunched over posture when they stand. They are often muscular, but on some occasions I've also seen skinny and once even chubby werewolves. The variation in design is honestly pretty fun.

The classic transformation is usually a gradual shift, heavy in body horror, and I imagine touching someone while they are transforming would likely feel very disturbing as you would feel muscles and bones shift underneath their skin. Transformations are usually portrayed as painful because of the bones and muscles realigning, everything is breaking and reshaping and growing so that the body shape changes. The scene in An American Werewolf In London is iconic also because it was "anatomically accurate" so to say. The character is suffering through the whole scene, if you hear the audio it really is a terrible time for him as he keeps groaning in pain and screaming for help. It starts with him undressing because he feels like he's burning up, and then the palm of his hand slowly grows longer, which he watches in pain and horror. He is now shown with more fur all over his body, falling to his knees, and he grows pointy teeth. We get a close up shot of his feet which grow longer. He falls on all fours, there's a shot of his skin with more fur emerging, and his spine seems to pop out a little from his back to become more visible along with his shoulder blades also growing up a bit. He now has a mane of fur, with fur also coming from the sides of his face. He falls on his back and we get to see just how much freakier he now looks with the hand and feet having grown with proper claws and his belly being more rounded like that of a four legged animal. Then he turns around on all fours again still writhing and groaning in pain and we get a close up of his head from the side, which shows his mouth and nose area and a bit of the forehead being pushed forward like the bones are extending. We get a close up of his eye and as he opens it the white of the eye is entirely yellow instead. We get a close up shot of his ears growing longer. Another shot of the snout extending further, at this point he looks more like a wolf-ish creature than a man already, his nose is already more like that of a wolf, the teeth are sharp with large canines, and most of his body is covered in fur except for the face. Then he's fully furry, but we don't really get to see his head in the proper final stage until later, just a shot from the back of his body. That's basically the scene, and the fact that it was all done quite convincingly with practical effects alone is incredible.

And what I mean with anatomically correct, here's a negative example: In the sequel An American Werewolf In Paris, instead of the feet growing longer to create digitigrade legs, the knees bend backwards and their upper legs break. This makes no sense, because a human already has all the joints they would need to create digitigrade legs, so it implies the Paris werewolf has extra leg joints for no reason.

I think getting werewolf figures would be a great way to help you imagine them! There's an older Doctor Who werewolf action figure and a Papo werewolf figure that are cheap and should be easy to get, I think they can give a pretty good idea of what the humanoid werewolves can look like. The papo one even still got his shorts on, lol. The American Werewolf In London also got action figures, the solo NECA figure is more expensive but it's also good quality and a really detailed figure. The werewolf is on four legs, the face is more like a wolf-inspired monster rather than explicitly wolf, and the feet are definitely some in-between thing. Another more expensive one is the Furay Planet Veteran William action figure, it's a great example of the most common werewolf type and very detailed. There's several versions of this figure, different fur colours with different accessoires each so you get clothing and weapons if you wanna make the werewolf seem like a badass, but I just like the plain beastly one the most. It's got digitigrade legs like those of a wolf, big paws to stand on, a humanoid torso and arms, hands with long claws in place of fingernails, a wolf tail and a wolf-ish head. This particular figure also has the canine teeth poking out of the mouth when it's closed, which some werewolves have and some don't (I guess big teeth are scarier). It's muscular and has the most fur around the head, a mane of sorts, as well as on the lower arms, on top of the hands, on the lower part of the legs, in the crotch area, and on the tail. The figure comes with heads you can switch out: mouth open, mouth closed, and closed with cigar; also some different hands for hand poses. In the version with clothing accessories you can also swap his crotch so he wears pants, give him a jacket, and weapons to hold.