Part-time jobs that fit around childcare

I am looking for part-time work that fits around school hours and found a few evening shifts near Birmingham. It has been a long 4 weeks. Shifts are four to six hours and the pay is weekly. Has anyone worked these shifts?

Ask whether the schedule is posted in advance and how they handle swaps. It matters a lot with kids.

Check how they treat part-time staff for benefits. Some add them after a set number of hours.