There are two parts to your question. The first one, the lack of funds to pay someone to help you may be a simple fix. There is a form to fill out, called an "Application for Determination of Civil Indigent Status" which, if you are eligible, will allow the clerks of court to waive your filing fee. So instead of paying the $408 filing fee for a divorce, you only will be required to pay a $25. administrative fee. The form is available on this site, at the clerk of court's office, and online at the Florida Supreme Court's site -- www.flcourts.org.
The second part of your question is how to proceed since you don't know where your husband is. Before filing your divorce documents you must carry out a process called a Diligent Search and Inquiry. You need to make an attempt to find him so that you can have him served. If you cannot find him then the clerks of court can guide you in how to publish your intent to divorce. The form called an "Affidavit of Diligent Search and Inquiry" is available on the Florida Supreme Court's site as are the other family law forms you will need.