For initial cost, maybe you can have a look at this: https://www.bbc.co.uk/parenting/family_matters/finance_cost.shtml and use it for inspiration to make a list of what you need. Then go to online shops/catalogues and note down how much each thing will cost you.
As for weekly costs, maybe you can interview your mum? Or a friend who recently had a baby?
In my experience you can't really plan these things (though it's useful to think about them anyway). I'd work out how much you have and then go from there. If you're generally careful with your money you'll always spend as much or little as you have. Baby stuff comes first and you might have to cut down on other things but unless your budget is completely unrealistic it's not as if baby is going to want for anything.
i never did a spreadsheet, but i might for number two - what i did when i got my bfp with maddi cloud9 was get a mothercare catalogue and post-it note everything i wanted for her, and what we needed, then brought way too much
i never did a spreadsheet, but i might for number two - what i did when i got my bfp with maddi cloud9 was get a mothercare catalogue and post-it note everything i wanted for her, and what we needed, then brought way too much
lol, I plan on only getting the essintials and letting other people buy us the extras. So far there is no grandchildren, or great grandchildren for that matter on ether side so all i can say is spoilt.