Hand, foot, and mouth disease

We found out today our 3.5 year old daughter has hand foot and mouth disease.

I have no experience with this and I know it goes away on its own but how can I help her and make her more comfortable? Her case is mild but She’s constantly saying her mouth hurts and doesn’t want to eat. I’m trying to get her to drink fluids but it’s like pulling teeth.

Also, they advised us to keep her away from our 10 month old son but that’s nearly impossible. And he was touching all their toys before we knew she had this. How can I help him when he inevitably gets it since he’s so little and can’t have much?

Any advice is appreciated!