Monday Hour One with little kids

Hello, I’m struggling to accurately plan my week as a stay-at-home mom with two little kids. I do work as well and try to plan my working time, my playtime with the kids, our extracurricular, etc, but find that it’s always a moving target.

For example, our rec center only allows us to book swimming/skating 3 days ahead (and it’s often booked during the time I want, so I just snag a space when I can). Or, I’ll plan something and the kids are just NOT into it, so I postpone it or scrap it altogether.

Any advice on Monday hour one for working moms with really little kids (mine are 2 and 4)?