From your 'My Hub' page (please see below)
On the left hand side of your account, you will see the side menu in which you can select 'Packages'.
Click on the 'Create Package' button at the bottom of your page
followed by the 'Assignments' tab from the 4 options at the top of your page.
If you then select 'Assign Programs' from the left-hand side
You will be able to select which program and either set a start date or make it flexible.
Once you have entered all the package details just click the 'Create Package' button at the bottom of your screen.