You can seek child support and spousal support. Your husband will have to provide child support based on his income. If there is 1 unemancipated child, his support obligation will be 17% of his gross income (minus FICA). Depending on his income, he may also be required to pay spousal support or maintenance (alimony).
An RJI is a Request for Judicial Intervention. It is a document that must be filed in order to have a judge assigned to a case. If there has been no further activity on your case, then there's nothing else to be done. You could contact the county clerk's office to see if anything else is in their file on your case.
The party bringing the new application can choose the court. As stated previously, family court is generally a better option than supreme court if custody is the only issue you are addressing at the moment.