Hi Sam

Noting that you are intermediate, probably a question best put to Lisa McCormick in her Ask Lisa sub-forum.

Lisa does a lot of the acoustic finger style tutorials for finger style beginners here as well as genre orientated ones. e.g. blues, where in the final part of the lesson she demonstrates how to put together a blues song.

That's merely illustrative, and possibly simpler than what you were seeking, but Lisa will sort you out with a direction if Christopher or someone else doesn't chime in beforehand.

Cheers 😎