If you play a string instrument and like any of these styles of music (Bluegrass, Old-Timey, Celtic, Gypsy-Jazz, etc.) you may like this Website – it offers free backing recordings for playing along with. You can slow down or speed them up.
There is also a section of common Chord Progressions to practice.
This is similar but a little less daunting. It includes the words, but you can’t slow down, etc. https://toneway.com/songs
I use Chrome browser on my laptop and my audio volumes were too soft and so I searched for a solution and found this.
It works great!