Been there, done that. But my ex-husband was really quite a mess. It is a tough world out there and I "made it" but it was a struggle and well, made some more stupid choices before I really wised up about how to pick the right guy for us, etc.
If your problems are that you fight a lot (and it isn't over cheating or being abusive, etc) I do hope that you consider marriage counseling. It can do wonders. Both of you have to be open to change and maturing and getting acquainted with better communication styles. You may find yourselves falling in love again and wouldn't that be cool for all concerned.
If not, well, frankly, your road will be tougher than mine but it is doable if the sacrifices you'll have to make are worth getting away from it instead of working on it. I don't know how because I don't know your skills but the cost of child care alone is high unless you have parents willing to help. And what will you do if you or the kids are sick. You can't work or send them to childcare. Raising a family is so tough alone and with little money.
Another way is that you go through counseling in a friendly way and if you decide that splitting up is the only way, then perhaps he'd be willing to somehow help support your getting some career training before you split. I presume he doesn't have enough money to help you greatly after divorced because of the cost of managing two homes. I also presume that even if everything is split 50/50, and you get child support, that it would still be tough. My ex didn't pay child support. It was too easy for him not to have to then. Things are a bit better now depending on what county you live in.
As for the advice to contact her regarding work at home, please know that most people find that these things are a scam. They get a nominal fee from you and then you're out of luck. I'd avoid that.
As for contacting a lawyer, it takes a great deal of money. They can run up hundreds and thousands of dollars. Marriage counseling is cheaper. :-)