Help!! (and some quick tests)

Since I've started to collate a lot of different materials (papers, monotype drawings, etc) I want to start putting it all together to build my posters. I've done some quick tests on photoshop, seeing how I can layer up the different pieces. However I'm not so sure anymore.

I try not to have an idea of the finished image in my head, and let the process lead what the image's aesthetic will look like but I'm a bit worried that this is directionless?

I'm also unsure about colour at this point. I've purposefully done all of my drawings in black ink or pencil, which means it will be easy to change their colours. I might need a colour palette in mind to give myself some rules so I won't spend too much time selecting a colour palette.

There's a crit tomorrow that I'm hoping will give me some answers.

These examples are far from being finished, I'm just trying to play around with all of the different elements and see how they would work together. I'm starting to consider layout and type, as well as the balance of line and shape that I would like.