If you want to know where your money goes, I suggest you use a cashflow plan in the same format as every company uses a cashflow plan. I have created a step-by-step tutorial including an Excel template, inspired from my journey as the founder & CEO of a 30-person B2B SaaS company. You can get it here: https://tomvogel.gumroad.com/l/how-to-stay-on-top-of-your-private-finances