You should search the "announce" section :) there are tracks from his pre-Queen bands Wreckage (3 "home-demo" tracks) and Ibex (a full live show from Liverpool in 1969) available to download, unofficially, right here on QZ (and just about every torrent site I'd imagine). And it's not just Freddie, either - there are some tracks (live and studio) from Roger's band The Reaction right here too. Also, a bit of digging might also reveal some Left Handed Marriage and 1984 (Brian May bands) tracks too.
The only ones I'd call "juvenile" recordings, though, are Roger's - he's only 16 in them, I think...
It ain't about how hard you can hit, it's about how hard you can get hit: how much you can take and keep moving forward. That's how winning is done!