Country boy here - cows are pretty harmless most of the time if you leave them alone, they might wander over to have a look, but they’re usually pretty docile. If you don’t want them near you, clapping your hands or making yourself big with your arms and shouting usually makes them go away. I will say that you should absolutely not approach them if there are calves nearby and bulls in general are typically more aggressive, but if you keep a safe distance you should be fine