I am in a divorce @ 20 years situation. I don't know your history with him, for example, verbal abuse, psychological and financial control, emotional abuse, and of course physical abuse. And you share a child, we don't. This is a 2nd marriage for both of us. I'm not going to advise you, but based on my experience thus far, consider some recommendations.

You're absolutely right to get, earn, cash in, etc., ASAP and get an account in your name. Make sure it's a different bank than his. Whatever you decide to do, money will make it easier. Get credit in your own name. If you will need to retain an attorney, there will be a retainer fee. Shop around. Some give free consults, some are ones you hear about, friends used, etc.

Gather as much financial information as you can, (especially tax returns and paycheck stubs), copy it and return it. If it's on the computer buy a flash drive, and get it all if you can password into it. At any rate, get it.

You have a long-term marriage and there are probably alot of considerations. Be prepared, get expert advice and take your time deciding, (lol I took 5 years!), and you willo know when to act. Trust me. You'll know when to take the next step to end the marriage.