Ringworm - Help, I'm panicking.

Hello! So Ive got 2 wonderful dogs, one of them is a senior dog with some health issues. We took home a stray cat that was recently diagnosed with ringworm. Immediately started treatmeant for the cat, we are one week in, its going well but Im afraid to death for both my dogs and my house. Im reading online HORRENDOUS things about ringworm, like its the Plague itself, how it never leaves your home, how it keeps coming back, how hard it is to get rid of the spores. What am I gonna do? I have vaccined the cat against ringworm, and Im thinking of vaccining my dogs too in the following days but will this be enough? Is the vaccine safe for them? If my senior dog catches the disease she wont be able to take the oral medication for it, as it a heavy medicine for her organs. And ok about the home, how Im gonna clean my yard and my shed, the cat have been roaming those too. Im in full panick mode, cant sleep, dont have the money or the time to deal with an infestation as hard as people make it out to be. Please, any help and advice is more than welcomed. Thank you, thank you in advance.

Hello - and sending hugs.  These things are stressful at the best of times.  Ringworm does indeed spread rather easily, especially to those who are very young or old and immunocompromised and therefore have a low capacity to fight it off.  They do not always have to be treated with systemic (go inside / right round the internal body) drugs, although I for one find these easier when it comes to cats.  There are also washes / shampoos that can do the job very nicely in canines, especially if the dogs' fur is short or can be shaved.   It's worth speaking to your vet to determine the best action plan for your particular household, but I wonder whether giving the immunocompromised dog a wash in the stuff on a preventative basis might be worthwhile?