DO NOT SIGN ANYTHING. Do not allow your husband to give any statements to the other party.
At a minimum, a lawyer will be the point of contact for the other party. They will not be allowed to talk directly to you. What you say and how you say it are important. This kind of injury is worth a lot of money. Yes, lawyers charge a lot. But they normally get a lot more for you than you can get by yourself.
I used one for a job loss case, and he hired an expert to do a financial damages report, and it was a lot higher than I had calculated. The other side even admitted that they knew his name and his work was accurate.
Your damages include not only his physical pain and suffering, but also the psychological impact, the strain on your relationship, future lost wages, your children's college education, a new car, etc etc etc.....
An attorney will normally charge only a contingency fee (33-40%), plus expenses. That means you do not have to pay any money up front. Shop around. They should all be willing to take the case, so you want someone who is good, and has a proven track record.
Good luck to you!