Have is specified that he provides medical and dental insurance for the kids.
Health insurance for you may be tricky if he gets medical insurance thru his work. Most companies will not provide coverage for an ex spouse, but you might be able to get COBRA for 12-18 months after the D is final. Talk to your L about options there.
Be as detailed as possible about visitation. Specify exact times and place (i.e., his home, your home, neutral place 1/2 between) of pick up and drop off. Cover all of the major holidays that are important to you -- Thanksgiving, Christmas, New Years, religious holidays that are important to you, school holidays, mothers day/fathers day, birthdays. Again, be as specific as possible. Remember that you and he can always do something different, but if there are ever an issue that you need something specific to fall back on.
Talk to your L about who is the tie breaker if you and your X cannot decide on a major life decision for your child. Things like medical and school, etc, are covered under joint legal custody but if you think one thing is best and he thinks something else is best then you need to know how to resolve the situation.