Single mamas help

I have a 6 year old and it’s just us. His dad passed away last year so my parents have stepped up to help “co parent” on the weekends. However, I need to get a second job because … well, we already know the sh*t economic times we live in.
My question/problem is, I don’t want to take away more time away from us together. I already work shitty hours (basically 8-6) so I’m gone all day before we see each other. Adding a nighttime parttime job will take up the little bit of I already don’t have. Any moms juggling solo parenting and two jobs? How do you make up time with your kid(s)? The mom guilt is already eating me alive and I’m not even working two jobs yet.
I’ve been applying to other jobs that will hopefully free up some more time and pay more, but it’s a brutal waiting game right now