Op you need to take this time to teach your DP to make simple meals.....
Spag bol
curry
Steak and vegetables
Casseroles
he needs to be able to plan, shop for, (online will be a lifesaver) and make at least 5 different meals within 20-30 minutes.
You BOTH may be holding a grumpy, crying baby at dinner time and you both need to be able to efficiently get a meal on the table fast.
Other lifesavers, dishwasher, tumble dryer, places to put babies on each floor of the house, ie 2 bassinetts on bedroom floor, 2 on living room floor, so you can put them down safely.
By the time they crawl, a large playpen area with a thick rug and all toys so you can do things ie cook, clean up, change nappies knowing one or both are safe.
Money...I second the poster who said proportion your salaries into a joint account for bills.
I also think you are very vulnerable by not being married, relationships can and do go wrong, you will be responsinble for 2 babies and need to be protected. Please think of a quick registry office wedding now and a bigger celebration in time.