Attempting to create a quote in Quickbooks (trail version).
The option to create a quote is not shown under the global menu?
You will see the Quote menu under Customers when you click the Create (Plus) menu in the upper-right hand corner. I made a screenshot for your reference.
QuickBooks lets you convert a quote to an invoice or purchase order, and you can do progress invoicing with quotes. Please check these articles for your reference:
Feel free to post back when you have other questions.