Just keep steady, play the long game. Do not give him any idea that you are thinking of divorce, as he will start moving money around. In fact I would retreat a little, maybe one meal this weekend that he will eat, you must not spook him. You really need his investment details.
On a separate note, having worked in banking, I’m not sure what you are hoping for from your meeting with your bank? They will really only be able to go through your accounts. You are not at a point where you should be moving money around, or taking him off of accounts. You could set up two signature requirements for certain accounts, which would stop him moving money from joint accounts without your say so, just be careful. I’m only saying this as I don’t want you to feel deflated this coming week.
You should get a lot from your meeting with a solicitor. It took me three goes before I found the right one. I do think it is important to find a good solicitor that will take on board you as an individual, be honest with what you are likely to achieve and that you feel you can work with and know they will fight your corner. However in a first meeting the legal advice probably won’t vary much (in my experience).
Keep it calm, you are in charge now, business head on. This could actually be the better paying job that he told you to get! 😂
Please treat that last comment as a bit throw away, I don’t actually believe that women should always come out with everything and half his pension, but he has clearly not been treating your fairly.