Any idea why I am getting Bad instruction? what does this mean? I am new to this.
It means your either didn't meet the min or max ETH cap. Minimum cap is 0.5ETH(after deducting all the fees from it, so you're better off sending atleast 0.52ETH) and max is 75ETH per individual.
So make sure the final amount is atleast 0.5ETH and don't send more than 75ETH or it gets rejected.