Welcome @SockHop and sorry for your families loss.
I'm not the best (which is why I account for myself here). For me I found identifying what wasn't on my monthly spreadsheet helped.
I have a 'sundries' pot where I added up the yearly average cost of random things like DD lunch money, dentists, haircuts, bread and milk type of shops, parking plus DD weekly activity. Every month I move £200 into an account which means I have somewhere to take it from as I spend and can keep a check on it running down before payday and cut it down to essentials only.
Do the same for weekly costs - so this is for weekly fuel and for a weekly cash withdrawal which goes into a tin to pay for people like the window cleaner who only takes cash.
Today not bad bearing in mind we are away for Easter
£10.20 parking while out on a boat trip (ouch but I didn't want to risk a ticket)
£7.50 ice creams. Took a packed lunch on the boat.
£22.77 KFC for three of us. The planned pizza night didn't happen as the caravan oven only had one shelf! Will take pizzas home and eat on Monday. Yes it's that tight next week 😂