Wills, insurance & trusts

Do you have any of the above? I have an insurance policy for all in my household (yes, even Elijah, through work). I am aware that children who receive SSI can't have more than $2000 in their own money. My biggest concern is a will. I do not have one, although I know I should. If you have one, can you pm & help me through it? I know it may be different for me because of Elijah and him having his dad as second custodian, but I still need to have SOMETHING. The reason this is on my mind now is I know someone who did not have anything in place, and passed away and left a disabled child behind. I would hate for something to happen to both me and Casey, and not have my children protected. I'm aware that no one in my family will have access to Elijah if I were to pass & that scares the crap out of me.