Hi Martha. You are right is is super friendly here and everyone is welcome.
Reducing food shop depends on how close you want to cut it. As a first step keep your shopping receipts for a month to see what you are spending money on. Keep an eye on waste too. This will give you an idea on where you can cut things out. I am terrible for buying bags of salads and letting them turn into a fridge swamp. Do you scrape loads off the plates before putting them in the dishwasher.
If you spend loads on a particular thing try to understand why that is. Takeaways and ready meals are the 2 most common. Look at ways to replace them in a sustainable way - batch cook and freeze, have a couple of I can't be arsed meals, get more help from the family or use a slow cooker. I find having spice mixes ready made up makes it easier - they are expensive to buy but cheap to make if you are near a Asian supermarket.
Cook seasonally and local / use the super 6 / supermarket's loss leaders as the basis of your meals. This week we are having lemon based things (and I will make the skins into preserved lemons).
Many of the "posh treats" are really simple to make / grow, but they just travel really badly.
We have snow and it is really sunny - I will need to dust off my sunglasses when I go walking later.