Wild Magic Sorcerer Help

I'm helping my wife with a Wild Magic Sorcerer build, but she is concerned with the possibility of killing herself/the party with fireball, while at a low level.

My question is, does anyone know of any way to mitigate or do away with Fireball being cast with a surge at levels 1-4?

I know that once she reaches level 5, she has access to Counterspell, but we are trying to see if there are any spells or items that would have a similar effect to Counterspell, that she'd have access to at levels 1-4.

Any help would be greatly appreciated.