Do you own your own home OP (mortgage or outright) or do you rent ?
After ten years of marriage you will be entitled to a percentage of the marital assets. Starting point is 50/50. Often more if your child with live with you the majority of the time. You will also be entitled to a proportion of his pension in normal circumstances. However you will need a solicitor - if he keeps all the money hidden and you aren't allowed any access to know what there is - then he has to be forced to 'disclose this' during divorce proceedings.
Some solicitors will offer you a free consultation but you need to have some facts in order for them to help you.
If he has money, then the lawyers can often offer for you to pay them from the settlement. If there is no information then they can't estimate how much it will cost.
Getting your 'ducks in a row' means doing a bit of hunting for paper work.
Find out who he banks with.
Try to get account number (these are often printed on his debit cards)
Look around for any building society /savings accounts.
Look for letters from a mortgage company if your house is owned by him. (It's owned by you too!)
Have a look online for property like yours in a similar area - try Zoopla . They have recently sold prices in your area, put in the postcode and see roughly what your house is worth.
What sort of employment does your husband do ? Try to find a wage slip or bank letter.
Does he earn well or do you struggle (as a family struggle).
If you rent, he is on a low wage and he has no savings, car, other valuable assets then you are best off to simply apply for a divorce on line. If there is nothing to share although I suspect there is probably a pension at the very least.