The lesson that I learned too late in my divorce was that I needed not a divorce lawyer but a divorce accountant.
At the start of your divorce, you should retain an accountant to look at your balance sheet as it was at the time of the marriage (which may involve a bit of forensics) and then as it is at the time of the divorce filing.
Depending on how long the divorce lawyers drag out your case, you may want to have the divorce accountant look at the case again.
What an accountant can tell you is what you were worth at the time of the marriage, what assets are in your marriage at the present, and what various divisions of assets would look like.
An accountant can also do some tax planning and forecasting.
A divorce lawyer isn’t likely to tell you that you should get an accountant. The divorce lawyer is likely to try to do that kind of work despite not having the skill/qualifications – and then bill you more than an accountant would have in the process.
If your divorcing spouse is not completely unreasonable, certifications from the accountant as to the financial statements may bring about a quick and fair settlement.