I want to go to court to get custody of my son. How do I do this?

If you would like to change the current child custody order, you will need to file a motion to modify child custody, which requires you to show that, since the entry of the last order, there has been a substantial change in circumstances impacting the welfare of the minor child involved.  If you plan on representing yourself, I would suggest going to your local courthouse and seeking out the "Self-Serve" center which are designed to help pro-se litigants.  I cannot speak to all counties, but Mecklenburg county has a great self-serve center that has packets of information to help pro-se litigants with filing the appropriate paperwork in child custody disputes.  I have also recently written a blog on the topic of procedure in child custody cases which may help give you an overview of the basic process involved.   You may also consider filing for contempt (if you are being denied visitation that you are provided through a court order) and seek to have a temporary order put in place (based on the grounds that you are being denied visitation).