Batter Interference ?

[Spence]

I am not an umpire. I am not a fan of either team that played in this game. I know no one on either team so I come with no bias(just potential ignorance of the rule).

High school game.

R1 takes off on a steal attempt. Batter swings. Comes somewhat across the plate. F2 stands up but makes no attempt to throw - probably because the batter was in his way.

Is that enough for batter interference or does there have to be an attempted throw? What's the minimum you need to see from the catcher in order to call interference on a steal attempt?

Thanks