Wanting to see my total income added up as a number (continued through each day) and then the expenses taken from said number, so I know if I ever drop below 0

Hi there, nicole_180-yahoo. 

You can only run the Profit and Loss report to show your financial performance during a specific period. This reports the net income by detailing your business's revenues, gains, expenses, and losses.

I can walk you through how to pull up the report that will serve as your tool for understanding the profitability of your business.

1. Go to the Reports tab located on the left panel.
2. In the Business overview section, select Profit and Loss.
3. Click on Customize to get the specific details you need on the report.
4. Tap Run report.

I've also added this link for reference in customising reports in QuickBooks Online. 

You can also memorise reports in QBO to save its customisation settings.

If you need more help managing your business, add them in the comment section. The Community is always ready to assist you. Happy Holidays!