If you plan to reduce your meat intake, you don’t have to consider anything, really.
If you plan to eat fully vegan, you should look up B12 supplements and make sure to get some proteins (beans, lentils, tofu etc). The whole nutrition thing is not as big a problem as you think it is, though. If you’re unsure, maybe get a blood test done after a few months.
If you plan to reduce your meat intake, you don’t have to consider anything, really.
If you plan to eat fully vegan, you should look up B12 supplements and make sure to get some proteins (beans, lentils, tofu etc). The whole nutrition thing is not as big a problem as you think it is, though. If you’re unsure, maybe get a blood test done after a few months.