Well done! Some great ideas here.
Expensive but worth it big changes for me were: weekly cleaner, fast/powerful hairdryer from Dyson and a dishwasher when my ex moved out. The latter two might sound silly but they have both saved me so much time. Outsource as much as you’re able to - oven/carpet/sofa/car clean, ironing if you have any, gardening etc.
Small but very effective changes: meal plan, batch cook and get the food shop delivered weekly. Having an evening to do nothing (once my child is in bed), to just decompress and chill. And have something in the diary for you to enjoy!
Small but useful things: having a stash of pound coins, a stash of pretty but generic birthday cards and wrapping paper. Probably not as useful if you don’t have school age children and endless collections/parties.
I find routine really helps me too for the repetitive tasks - e.g I have weekly reminders in my phone calendar to put the bins out (and a note whether it’s recycling or black bin), to pay for extra curricular activities on a certain day of the week. I have a terrible memory so need everything written down.
As you’re just starting out you could set aside some time to go through bills/policies and diarise renewal dates, create a budget if you need one or even just a basic spreadsheet of your bills/outgoings.
If this all sounds too much maybe just start with a list of jobs you hate/find time consuming/difficult/stressful and see what you can change - it could be that you outsource it, delegate it, stop doing it completely or look into a more efficient way of doing it.
I have two lists on my phone - one for urgent things (like return some clothes) and one for non urgent things. Sometimes if something stays on the non urgent list too long I decide it can’t have been worth doing anyway so delete it.
Finally, lists! Some of these things might sound like hard work, you might need a day or two of putting the work in to get things in place, but once your ‘systems’ are up and running it’s just a case of maintenance and tweaks as and when needed.