The below site runs a monthly mixing contest with Reaper and using only Reaper plugins. It's free and, from what I gather, tracks are provided. There are no prizes but it looks like fun and great way to get some mixing practice.

https://reapercontest.wixsite.com/home

The below Youtube clips on using Reaper's stock plugins to mix with is run by the organisers of the contest.



DIRECT LINK
https://www.youtube.com/watch?v=TMTlI3LS1zk


MY SONGS...
Audiophile BIAB 2025