Would it be possible to work out any savings you could make financially so that you could manage on less hours around your husband's shifts?
(Not advice I would typically give, but he needs to work for his visa).
For example, and I know rented places are thin on the ground, but keeping an eye on gumtree for a cheaper place to live might free up some money.
Getting used to using less central heating might help with bills.
Keeping your eye out for work you could do from home might be another option, or work with shifts that mean you can work when your husband is home.
Or sometimes people make friends with other mums in similar situations and swap childcare informally. Obviously this is a tricky one unless you can totally trust someone, because this childcare isn't linked to any safeguarding processes.
I've been very poor with no childcare and I cobbled things together so I could work, but I was lucky in the sense that my rent was low. I worked hard to work out how to make savings in ways that it can take a while to get used to in a new country - like a lot of food was cheap from farm foods, home bargains, poundstretcher, b and m.
It is tricky just now financially for everyone but I think part of it is getting used to being in a new place too. You can ask on here in the Money Matters topic about how people save money in certain areas.
I save a lot on groceries by volunteering with Olio as not all the food is requested.
I'm not sure if this is useful to share, and I'm not meaning to suggest you're not trying your best already, but I've really struggled for money and I've worked with lots of people who've been new to the UK and they've sometimes found it helpful when I've shared ways that I cut costs.