If your a family that likes things like stews, curry's, allsorts really then a slow cooker is your friend! Prep and throw in, leave it to cook and then witching hour (usually coincides with dinner time!) There's no sorting dinner you've already done it.
Don't worry about the housework, your in the thick of the newborn stage plus in the thick of baby transitioning to full blown toddler.
Focus on your own health, doesn't matter if baby is in the same baby grow they slept in, doesn't matter if your toddler wears odd socks (or no socks!) Just stick to basics, anywhere your toddler is safe like enclosed parks or even an empty basketball court with a ball or balance bike etc. Are easier with an energetic toddler. Go for a walk before nap time, don't worry if lunch is later than usual (my toddler won't eat lunch half the time and would rather nap!)
Going for a walk, use a double buggy or a buggy board and ask your toddler to look for birds, trees, cars, etc. Will keep their mind entertained whilst baby is asleep, chilled and your getting fresh air and a break in a way too.
If your lucky enough they are both asleep napping, lie down and watch TV, or sleep yourself if you can. Do not worry about the housework, it will get done eventually but you need as much rest as possible to have energy for 2 under 2.
If you can outsource anything or make something simple do it. Screen time is not going to ruin your toddler so if it keeps your stress levels down, baby is happy and your toddler is enjoying some downtime with a screen for a short while it's really not that bad.