Everybody tends to feel knackered when they start a new job to be fair.
You get use to it, and find the routine that works for you.
I am up at 6, deal with all the chores 5 days a week, get ready in 10 mn max and leave around 7:30 most days.
Evenings are just the admin, diner, and folding laundry when I can be bothered to watch tv.
I go to the gym, or run or whatever either in the evening, or at the weekend, sometimes at lunch time but that's rare- I think 3 hours of exercise a week is the very bare minimum and I am less tired than if I slob in front of the tv doing nothing. I sleep better, and I am more relax.
online shop is done in the train
I do a quick wizz around the house before bed so it's aways tidy when I wake up.
DH and I share chores and don't bother the other one with our share - I mean we ask for help if needed, but no one needs to remind the other about stuff.
I have 2 primary kids, 2 secondary older ones.
I try to work from home as much as possible, save on commuting time and I can put a load of washing whilst I am there, but that's about it.