You really do need to talk with an attorney. You may want to start with the attorney who represented you on the Obstruction of Justice charge. That attorney may be able to guide you through the process or refer you on to another lawyer. You really can't afford NOT to have a lawyer.
If you had an order setting out the terms of your agreement and your ex wife has not lived up to those terms, she can be sanctioned for contempt by the court. If there was no order, but an agreement, you may be able to enforce that contract. You need to seek legal help.
As a general rule you must be separated for 6 months if you have no children and 1 year if you have children in order to finalize the divorce. You need to sit down with your attorney and asked that the attorney explain to you where in the process you are.
Yes you can be sued. The real question is whether you will lose the case. In addition, libel is not the only reason the employer might want to sue you. You say you have documents from the company and videos. They may claim a right to the documents you have, or claim you are violating some agreement they had with you as an employee. I see your situation as fraught with danger. You really should seek legal counsel.
You deserve someone who will return your phone calls. You must file your law suit in the correct court, against the correct defendant within the prescriptive period. If the accident happened in Louisiana, that usually means within 1 year of the accident. You need to find out what is going on.
You need to either listen to your attorney or get a second opinion. Pleading guilty to a sex offense is a very serious, life altering event. You need to be very very sure you can live with the consequences.
It appears you tried to do this on your own. You really need to seek legal counsel. The procedures for divorce, division of property and care and support of children can get quite complex. On top of that each district does things a little different and each judge has their own preference as to what they want done before they sign off on a order. You may not have dotted all the "i"s and crossed all the "t"s.