Is getting a second bachelors degree a getting a good idea if you want to pursue a new field?

I would pursue a career in advanced science, or higher education in the future, but I’m 2.7 I Mass Communications (too introverted for that field anyway). I already looked vocational schools and professional certificates, and not going that route because they offer programs just for low end repair or computer jobs, but wouldn’t lead to anything higher. Like if I wanted to be a veterinarian, getting as a job as a veterinary technician turns out doesn’t help much if someone wanted to get into veterinarian school, because of the price and competiveness. So that go that way would just be a waste of money.

Same goes for professional certificates.