Sorry, from what you have shared above you need to retain a lawyer. Your choice not to appear or defend until that very last hearing, as well as your appearing at that hearing and likely failing to raise any valid objection to what happened before or to jurisdiction, likely leaves you in a very weak position for trying to get relief from the judgment.

At this point we don't even have enough information to determine if your objection to jurisdiction is valid. You have told us nothing about your husband's U.S. domicile, and your temporarily living with a friend or out of your car may not have been sufficient to deprive the county where you were previously domiciled and to which you had returned of jurisdiction over the divorce (even if we assume your husband was not domiciled in that county).

If you can figure out how to file your own appeal, you have the right to do so. But the history you have shared suggests to me that you're not likely to succeed with an appeal as a do-it-yourself project.