If you're not comfortable with this attorney then you should look for a different one. If you were in the middle of a complex case I might suggest otherwise.
Perhaps it would help if you realized that attorneys have an hourly fee. If you've agreed upon a price then you are limited to a certain amount of time.
When he shook your hand saying that you should call if you need anything I would take this to mean that he thinks he's completed whatever you've asked him to do. Did you hire him to take care of child support and details or is there something else that you want to have happen?
You can learn much of what you need to learn about the legal process in which you're involved by talking with the agencies which will administer the court judgments. You can ask questions about their involvement before you have an actual judgment. You can also get information from the Internet. It may be that an attorney will be better able to answer your questions if you already know some basic information.
Another source for information is the library. You're getting a divorce. Look for books and Internet info on divorce. It would probably help you to read up on the general dynamics of divorcing as well as how the laws in your state relate to your situation.
Look for a support group of people involved in processes similar to yours. You can probably find groups by googling such and such support groups.
Counseling will also help you deal more effectively with your situation. Many counselors have had experience with divorce and child custody and can walk you thru the process. Counselors sometimes have a list of attorneys with whom they've had experience. They will not usually recommend one specific attorney but will give you several names from which you can choose.
Your attorney can also better answer your questions if you think them thru and write them down. Are you saying that you're at a loss about where to begin? If so, write down your ultimate goal. It sounds like in this instance it was to have your ex pay child support. Perhaps you started with wanting court ordered custody. Did you hire this attorney for your divorce as well as child custody and child support?
Some attorneys are very good about explaining while others want their clients to mostly trust them to get the job done. Interview prospective attorneys and ask them if they are willing to explain things from scratch.
Also, some attorneys are good at handling their clients emotions while others are not. From your description it sounds like this attorney was not able to deal with your emotions.
You can find support people including a lawyer by talking with other people, calling listings you find in the Yellow pages or on the Internet or read in a neighborhood association newspaper. Then, make an appointment if they are offering what you are looking for. Most first appointments are free or have a lower charge then subsequent appointments because their purpose is to find out if they can help you.
The way you know an attorney is good and if you get what you pay for is for you first to know what you want and be able to verbalize it to the attorney. Then when you hire him the two of you outline what you expect from him that he's able to do for you. You don't need to know the law or your rights to know what you want. Tell him/her that and then (s)he will tell you if that's possible.
You may not need an attorney at this time but it would be good to have one in mind in case you need one in the future.