Oh, OP, I read this with tears in my eyes.
I absolutely recommend Too Good to Go if this is available to you.
Pasta is going up in price along with everything else, but courgette makes a surprisingly good spaghetti if you slice it really thinly (you don't need a spiraliser or any fancy tools).
The Old Style forum on moneysavingexpert.com is a treasure trove of thrifty recipes. Hob nobs and fruit cobbler are still some of my children's favourite sweet treats.
When cooking rice and pasta, as long as you have a pan with a lid, boil it for 5 minutes then put on the lid and take off the heat. This saves a fair bit of energy each time. Lid on for 5 minutes for pasta, 15 for rice. Rinse the rice first.
Things cook quicker if they're in smaller pieces.
Also, white vinegar is a great cleaner, fabric softener and limescale remover.
You are not alone. You have an army of online mums fighting the same battle. Courage to you.