Good day, oonyona08.

In QuickBooks Online, you can easily set up asset. Here's how you can do it:

1. Click the Gear icon.
2. Under Your Company, choose Chart of Accounts.
3. On the top right, select New.
4. Under the Account type, select either Fixed Asset or Other Asset.
5. Choose the detail type that best describes the asset, then click Next.
6. Name the account.
7. If you mark the Track depreciation of this asset box, the system will automatically create a Depreciation subaccount for the item. 
8. Fill in the original cost fields.
   • If you’re only recording the loan for the asset, please leave this blank
9. Select Save and Close.

I've added a screenshot below for you to see it.

Don't hesitate to post again if you have any questions about QuickBooks. Have a good one!