While I genrally think people should pursue whatever career or course of study they want, I do find it quite troubling that the OP wants to be a vet tech at the same time as she is posting about being unable to train and care for her own cat, to the point she admits yelling at the cat, saying it has mental issues, refusing to take it to the vet because it costs money, and saying she didn't litter box train it because she doesn't know how. That does not seem like the right course of study for someone who has no knowledge, patience, or ability to work with animals.