You can add many music services to your Sonos system using the controller’s “Add A Service” menu.

Sonos does do Bluetooth on selected speakers, they are clearly marked on the sales and support pages.

You can’t “upload music to Sonos” you can play music you have uploaded to a compatible device.

https://support.sonos.com/en-us/article/add-your-music-library-to-sonos

Beam 2 also supports Apple Airplay 2 if you have music on a compatible device. 

You need to subscribe to Spotify, or Apple Music, or Amazon Music, or Tidal, or Deezer, etc. 

Then you add that service to your Sonos, and you can then play many millions of tracks.

Or if you have a music library of tracks on a Mac or PC, you can play all of those on Sonos too but connecting your music library. 

How do i add a songs from the music labrary?

Can i do it as well from sonos web?

Once you have set up the music library you just  pick the songs you want from them list the  ontroller shows you when you select the library as your music source

See https://support.sonos.com/en-us/article/add-your-music-library-to-sonos for how to ad your music library to Sonos. You could also upload your music to iBroadcast (free) and ad that as a music service.