How do I Disable a sprite?

So I have a 2 text inputs. And only when you write in those 2 text inputs should you be able to click on the sprite (It is not a button) I saw there is a disable button action, but that's for button. Is there any for sprite? Thanks.

Here are 2 possible solutions I could think of. I don't know your needs, but perhaps you can use this as an example to get what you want.

Thanks! I did the 2nd method,and it worked but I would like it so if they press start without typing in anything then it should say, please write your name an email