We have 1 toddler and that is hard, I look after my friends toddler for a few hours a week to and I am run ragged for those few hours so I very much take my hat off to you for having twins!
I have 4 all primary age and an OH who works silly hours...I have long ago stopped being cross/questioning if or why he has to work such long hours and learnt to rely on my own efforts IYSWIM because ultimately the only behavior that we actually have full control over is our own.
The following things that have helped me have been:
Ocardo, the only online grocery delivery service to never let me down or offer ridiculous substitutions, I can also buy fairly decent make up if I need and can't get out to the shops
Routine and the mantra 'all fed and none dead'
When times are tough and time is short doing the absolute essentials and no more, yes to homework and reading, no (and NO GUILT about it) to helping with PTFA activities, or going crazy for things like world book day
Get the equipment that you need, make sure you have a good tumble dryer and dishwasher, if you don't have them already then get them (by whatever means!)
Ask for help, if your parents are willing to help then could they come to your house instead and give you a hand with the twins? could your DH lie with them until they go to sleep? Is it time to teach them to sleep by themselves so that you can meet everyones needs?
Booking time away from everyone, I book a cut and colour in the diary for a Saturday and tell DH that I need him not to be working. I get to feel like me again and get some quiet thinking time
Paying to put the twins in nursery once a week. Youngest goes one day a week. I achieve more in that one day than at any other time!
Marie Kondo, the subject has been done to death on housekeeping but owning less stuff and living in a clutter free house has been revolutionary...
I also work out in the diary the points when I am likely to not have enough of myself to go around, I get DH to book off the odd day or just say no to things so that I can reduce the amount going on to a level that I can cope with
If I don't put my foot down and be assertive then everyone just lets me carry on until I am run ragged! I can end up feeling like a bit part in my own life...just here for everyone else. If I keep well and keep sane then I am nice to be around.
Have you looked around nursery for when your twins turn 3? I have my paperwork in a September place already.