It all looks like you’ve got the bones of a good house, it just needs TLC and time.
Make a proper list, going through room by room. Then divide everything you want to do into types of job: 5-10 minute fixes doable with a kid in a playpen, half-hour to 45 minute jobs doable during nap time, half-day jobs that need partner to take the kid out, things you can achieve in your lunch break, things worth paying someone for.
Then begin to tackle them… I glossed an awful lot of skirting boards while on camera-off zoom calls, hemmed my curtains cheat style with iron-on hemming tape during nap time, pleated and hooked them while DC watched cartoons. If you break each task down into bits it gets easier, so your curtain poles is: measure up what you need, browse for what you want online, order the pole, check you have the rawl plugs and fixings and drill, spirit level, etc, measure and mark for the brackets, drill the brackets, put the pole up, hang the curtains. You don’t do all those things at once the way you would without DC - you make the list and do each bit in lunch breaks/evenings/nap times/TV as baby sitter times.
I agree that the wall is fine and some pots and things along it will not only look nice but create a path for your kid to know where to walk/step rather than running everywhere and falling. “Slow down by the big red plant pot” type thing.
If you cba to strip back the kitchen cupboard paint and start over, use either Dulux Super Grip or Zinsser BIN as your primer: then you won’t have to sand back to bare wood, those things cover and prep everything. Or use Annie Sloan paint or Frenchic. There’s also an anti-peel primer from Zinsser I’ve used successfully that sort of glues down the edges of peeling paint so you can prime and paint over, but I think it requires at least some of the paint underneath to be sound.