I started using spreadsheets to keep track of my personal finances years ago, because I wanted to be able to split my bank account up into individual "Funds" so I knew how much I had set aside for Groceries & Rent & Bills & whatnot. As I got more familiar with formulas & all, I eventually made a pretty flexible template that lets you keep track of multiple Accounts (like Checking, Savings, etc.) and then separate Funds within those accounts.
This budget spreadsheet works a little differently than other templates I've seen. With this one, you keep a running list of your transactions (I typically pull the online banking page up once or twice a month & enter everything new in). You can list the "Account" and "Fund" for each transaction, and the sheet will keep a running total, so you know how much is left after each transaction. I've included a Read-Me page and a sample spreadsheet to help get started, if you think you might want to use this system!
Right now I have the template hosted up on Google Sheets, but if you prefer Excel or LibreOffice Calc, you should be able to download it and convert into one of those formats without losing the formulas that run the whole thing.