Did you and your ex agree on when it was OK to start seeing other people before the divorce was final? What was the mark you agreed on, e.g., when there was a formal separation agreement in place, when one of you had moved out of the house, something else? Any guidelines or advice on how to navigate this, particularly if the split is relatively amicable?
Some factors would impact when you start dating, such as:
Do you have children? If so, how old are they? If they are out of the house (e.g., living on their own or in college), it will be easier to start dating before the divorce is finalized.
Have you discussed this with your attorneys? Specifically, are you sure that even if your "soon-to-be ex" agrees that you both can start dating, they cannot use this fact during the divorce?
Do either of you know someone you plan to date as soon as you can? It can be problematic (for a variety of reasons) if one of you starts dating someone seriously right after you two agree to get divorced.