The mental load is really important, especially if he is moving into your existing set up. He might put the bins out, but do you have to remind him that it's Monday night? He might be willing to clean the toilet but do you have to ask him and check that it has been done?
The main thing in terms of housework is that he has to learn to notice when something needs done. That's his first job every day when he comes home from work - to notice if there are unwashed dishes, to check whether there's any laundry (that need to go in the machine, taken out the machine, dried, or ironed, put away - the whole lot). To look in the fridge and see if there's milk, butter, eggs, cheese, bread - and if not, to add it to a communal (and visible) shopping list. Who actually carries out the chores can be agreed between you but you need him to take his share of the mental responsibility. Now. Or he may never do it.
Also the admin load. He needs to be aware of when bills are paid and how much they are - if they're all on your account and in your name it is a very easy thing for him to simply transfer £Xamount at the start of the month then never have to think about it again - suddenly it is all your responsibility to check there's enough in the budget, or to deal with price increases, or to manage everything to do with utility supply problems, new broadband, etc... And all HIS personal admin is his: his Mum's birthday, arranging family gatherings.
How open are you going to be about your personal finances? Who has savings? Who spends on coffees, gym membership, meals out? How is that financed? Will you be transparent about debts / credit ratings? Do you both have the same amount of pending money?
Cooking? I'm like you, lovel to cook, happy to do it. But dh CAN cook. He has his own version of a 'Jamie 5 ingredient' list, simple dishes that he loves to eat and that he can do quickly (pasta, lemon, basil, pinenuts, parmsan, crispy bacon). He is responsible twice a week
None of that sounds romantic, but having the mental load shared, not building up resentment, being confident that you have a shared approach to money - all of that leaves you able to devote your creative time to being together, being in love.