Assignments are not graded automatically. Each assignment needs to be graded by your instructor. You can access the grading information provided by your instructor in My Grades which is available from the Grades area of the main navigation, from the Tools area within the course, or on the assignment's Review Submission History page.
The main navigation has a Grades area which shows a summary of grades in all courses. Individual courses are presented there as a group with recently graded or summary grades displayed, depending on the settings your instructor has set in the course. Clicking on "View all work" in this area will take you to the My Grades area of the course where you can see feedback and additional details.
By default, Blackboard courses include an area called "Tools" that provides student access to My Grades. Your instructor has control over the display of this button. If you do not find it they may have moved or renamed it, or they may have created a link that takes you directly to My Grades. If you do not find the option shown below, you can access My Grades through the main navigation or contact your instructor to ask how they prefer for you to access My Grades from within course.
You can view your grade and any annotations your instructor made to your assignment submission directly from the assignment attempt without downloading the file. The panel to the right of your submission includes attachments and comments created by your instructor including audio or video feedback.
Blackboard hosts additional information on the My Grades page.