But you're new to being a SAHM. Don't give yourself a hard time. We're all rubbish at it and want time to ourselves at first. You may find that you sort out your days to get some space, but you might not, and it's important to learn skills to cope with that. My own breakthrough was to give up on that and really throw myself into enjoying time with them, since it was what I had to do anyway. Plan it and organise it like you used to plan a work day. Know when you are tired yourself and structure days so DC know what to expect.
For pre-schoolers and holidays I had a pretty rigid routine that made life much easier and more enjoyable.
In the mornings we'd go out - ideally to some place with other adults - a play group, music, church group or soft play, but if not, to a play park or city farm or similar, or even round the shopping malls or for a ride on a bus or train if the weather was vile.
Home for lunch and a bit of quiet time. Encourage them to nap if they will or if older DC can't, let her have a dvd or audio book. Or let them watch tv for an hour while you have short break. Then out again to either meet up with a friend for a cup of tea or go shopping, or invite someone round. Or another trip to the park. Discuss what they will do before you get there. And offer a bribe. If DD is very sensible and grown up and doesn't run off then she gets some tiny reward - a penny or a pasta piece to put in a jar, to build towards a grown up treat for just the two of you.
The 'rules' for us were: get out of the house for three hours every day.
Speak properly to at least one other adult every day.
Don't worry too much about the housework. Again, a very short routine helps keep on top of it - wash load on first thing, peg it out after breakfast, all toys tidied up by everyone (not just by you) before tea, then bath, stories, bedtime. We did housework as a game. DCs LOVE housework. They love feather dusters and soapy water and will work off energy on a bit of window polishing!
If you have a really bad day, always have an emergency plan - buy take aways or ready meals and put Barbie dvd on for 400th time. You'll all survive.
It was my least favourite time of their childhood. I'm a much nicer mum now they are school age. But, because we had so much time together, we grew really close, I got far better at being a mum, got more confident, more engaged with it, and now absolutely love it above anything else I've ever done.