The important first goal is to have your Sansa clip recognized by MusicBee. If so, you should see it in the left panel under 'Devices'. And from there you can adjust several settings, such as syncing.
If your Sansa Clip is brand new out of the box, first see if Sandisk is offering firmware updates themselves, so you are sure you start of with the most recent official firmware for your player.
If you are a bit more adventurous, you might try RockBox. It is an alternative operating system for many players, and also has a Sandisk Sansa version.
Then check first if your Clip+ is supported. (my Sansa Clip is 3 years old), and only install it if you understand the (minimal) risks, since you will be messing with the internal operation of your Sansa player.