No need to apologize; there are several different ways of customizing the Mail user interface and everything might not be as simple as it should be.
Mail's default appearance is shown in this screenshot from the Mail User Guide for Mac - Apple Support.

Those columns show the Mailbox list on the left, the message preview in the center, and the selected message content on the right.
In the above example, there is at least one message in Drafts. If you click Drafts, a list of those draft messages will appear in center column. Double-clicking the draft message (or choosing File > Open Message) opens it so that you can continue to edit that message, send it, save it in Drafts as edited, or close it again.
If your Mail app does not resemble the above screenshot, the Mail User Guide for Mac - Apple Support explains how to Use column layout in Mail on Mac which may explain the reason.