I have Questions about installin ADOBE PREMIERE ELEMENTS ?

The important part of what you bought is the serial number. 

You can install the sofware by inserting the disc in your computer if your computer has a disk drive.  If not, you can download the same (or even newer) installation file.

Both will use the same serial number.

Download Adobe Premiere Elements | 2019, 2018, and 15

I'm assuming Premiere Elements 2019 and you don't have a disc drive:

You can download from here and then enter your serial number:

Download Adobe Premiere Elements | 2019, 2018, and 15

or

You could copy the contents of the disc to a flash drive on another computer and install from the flash drive.

or

You could use an external disc drive.