Lice 😩😩😩

All three of my kids caught lice from daycare. At first I thought it was just my younger two (I keep my 4 year old's hair in braids.) But sure enough, when I was taking her hair down today to check her, I saw them too. 😩😫😫. Pray for me. She has A LOT of hair I'm going to have to get through with this FINE tooth comb. Any suggestions? Preventative or treatment wise, this is my first interaction with lice ever and I'm almost 30.