If you'd like to improve your mixing skills, but
you don't have any songs to work on....
...You're in luck...
The Cambridge multi-track library has a kajillion songs for you to practice with, in any genre you can think of.
(ok...maybe not in that avant-garde
electro-shoegaze jazz genre you were dying to practice with but still...)
And it's all free to use!
And if you'd like help getting your mixes set up properly, download the Easy Mix Approach while you're at it to make your mixing skills improve even faster.
Have a great weekend,
Björgvin