What are the life insurance laws in Ohio?

My dad recently committed suicide and after his death we found two life insurance policies. My mom was the beneficiary for one and my grandpa was the other. My parents were divorced a few years back so she didn't get it and it went to my grandpa. My dad was highly abusive and almost three years ago I was removed from his care and a protection order was in place. I haven't talked to him since. In my dad's will he stated that if I respected him at the funeral some of his life insurance was to be used to pay for my whole college education. I went to the funeral and before I even walked in the door my grandpa began to fight with me. After the fight I asked if the casket could be closed for the service so I could attend (I did not want to see my father dead) and my grandparents refused and told me to leave. If I get a lawyer do I have any chance of winning my share of the money? I heard from my cop friend that if I am the soul heir I definitely have a right to the money no matter what. I do not want this money for monetary gain, I honestly need it for college. I am struggling to pay my tuition. I don't want to waste my time, money and effort if I have no chance of winning. What do I do? I am 18 now by the way.