Summarize the following:
Click the Windows logo in the bottom-left corner of the screen. This will search your computer for the Groove Music player. It's at the top of the Start window. Doing so opens the Groove window. It's a gear-shaped icon in the bottom-left side of the Groove window. The Settings page will open. This link is below the "Music on this PC" heading that's near the top of the page. It's in the middle of the page. This will open a File Explorer window in which you can select a music folder. Click on a folder that contains music which you want to add to Groove. You'll find the folder on the left side of the File Explorer window. It's in the bottom-right corner of the window. You'll find this in the lower-right side of the Groove page. Doing so will begin uploading your music to Groove. You can't purchase music through Groove, but you can purchase a Groove Music Pass that lets you download music for free. To buy a pass, click Try a Music Pass in the bottom-left corner, click Start trial when prompted, and enter your payment details if prompted to do so.

Summary:
Open Start . Type groove into Start. Click Groove. Click Settings . Click Choose where we look for music. Click +. Select a folder. Click Add this folder to Music. Click Done.