So I've learned the 5 positions for the C major pentatonic scale to the point I play my own rudimentary solos up and down the fretboard.

I think my next step would be to find a song in C and improvise my own solo over top. I don't yet have an 'ear' for how scales fit into a song structure. I know there are loads of songs in C, but could you recommend one in GT (rock) for my little experiment?

And after I learn the major pentatonics, I'm thinking I should learn the minor pentatonic and then the blues scale. Is there a preferred order for learning scales?