Almost 100% of divorces in Georgia are no fault so proof of infidelity rarely matters.
Questions as to whether you should get a job now or later are complex and depend on a lot of information not in your post. Before you make missteps, see a lawyer first to discuss the details.
If you file a divorce without your spouse knowing you have created a contested as opposed to a possibly uncontested case, and will usually significantly increase the cost of the proceedings.
A weekly guide with tips and legal advice for each stage of the process.