Freelance is not about just getting clients and delivering your services. Since you are the boss for yourself, you have to think about other things in parallel. One of them is being accountable for your finance flow.
When it comes to handling this, I've seen different approaches:
Some use standard spreadsheets like Excel or similar solutions on cloud like Google Sheets. There are built-in templates for accounting.
Or do you hire a professional to handle all of that, so you can fully concentrate with interactions with your clients and your business logic?
What's your approach on handling your Accounting and how much do you spend on it monthly?