career advice

hi everyone!! im currently a first-year student in undergrad. ive always wanted to work in the marine bio field, i love conservation research, etc. ive heard that a lot of people graduating w a marine bio degree (even w a masters) end up dissatisfied with their job. ive always known about the lower end of a salary related to these jobs, but i dont want to go through grad school to end up somewhere that i dont enjoy + barely making money. recently ive been exploring the vet route as i want to work with animals, and it also seems to be something i could enjoy although marine bio remains my passion. if anybody cld give me any advice, id appreciate it. im really feeling lost. thank u :)