2
Buy/acquire land. Without land you cannot have cattle. You could buy land, acquire land through an agreement with your parents or grandparents to inherit land (if you have family members that are actively farming and looking to retire), rent some land, or have a cow-lease agreement with another producer to start raising your cows with once you do acquire some land.
Research the laws and taxation that comes with buying/renting/inheriting land, both municipal, state (or provincial), and federal. Also know the pros and cons of the land and climate you are buying/renting/inheriting into, so you know how to manage your cattle accordingly.