Custody Issues

So i (M) live in Ohio and me and first childs mother are split due to personal reasons. She got with another person who is adamantly trying to keep me away by getting first child's mother to block me, not allowed anywhere near me. We have never been to court before for one person to have full custody but i have not been able to see child for nearly 3 years. Child is 3 years old. I do not have money to go to court but want to move out of state but don't want to lose my chance to be able to at least try to get my first child. My current fiancee is pregnant with twins and i am utterly torn because we dont have the help here to take care of twins like we would need. Is there any way to keep my custody or go to court but still be able to leave and late take first childs mother to court or is it literally not possible if i leave?