You should retain a lawyer to commence a divorce action and to utilize a process server to locate your husband. It is very likely that the process server will be able to find your husband and personally serve him. If the process server cannot locate him, then the attorney will make a motion for "substitute service" such as service by publication.
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).