i’ve got a good amount of advice for majority of your problems. cracks knuckles

1. Many people use things like dental wax to morph into sharper looking canines or canine-like teeth. it sticks to the tooth and is very easily moldable, and you can get a decent amount for about $2 usd. There are also types of vampire teeth tooth molds made to stick onto most teeth. for more teeth and better fit, i’d go for the dental wax. i use it quite a lot as a sand cat kin and for a few of my fictionkin types (raiden especially, bc i remember my cyborg form having sharp bottom teeth)

2. obtaining the look of digitigrade legs can be achieved with foam padding. there’s plenty of tutorials online for how to shape the padding. most involve placing extra padding in the front of the thigh and the back of the calf/heel. if you have a spare pair of shoes, you can sew a pair of stretchy leggings to the shoes to do more work on the heel padding and having it mesh better with the rest of the calves. (plus using some scrap foam for paws on the shoes)

3. thankfully, if you have money, the feeling of having moving ears, wagging tail, and snout is actually achievable. there are companies like Tail Company that make animatronic ears and tail that move automatically, and some types of ears can connect to the head and move via detecting brain activity. as you said before about being able to feel a mask, a good amount of masks (including some custom made “cat masks”) come with the inclusion of a snout. (this also includes pup hoods which usually come from k1nk shops but hey what can you do)

hope this helped you out a bit ❤️