Should you get a service dog/assistance dog?

Do you have a disability?

Would a dog be able to do tasks to mitigate your disability?

Would you be able to train a dog to behave in public or is there somewhere/someone who could do this for you?

Can you look after a dog? (Take it on walks, out to go toilet, pay for its food, vet bills, insurance etc)

Are you willing to do thorough research on service dog/assistance dog law in your area?

Hypothetical: your dog starts licking their lips and you can see the whites of their eyes, what do you do?