Hey,
i did take a closer look and the progress is nice so far.
I have some suggestions though. ( i went forward with the suggestions of @NessIllustration )
I will show two suggestions.
The one with the circles is showing, that everything is kind of using the same space.
Every part of the poster is as big as the other, the Font, the People.
you can absolutely work with different kind of sizes. maybe the guy on the tree is nearby and bigger then the others or something like that. it could make it more interesting
You also could google sizes for fonts on Posters.
I don't know how big the poster will be printed. but if its around A3 its big enough to make some fonts smaller.
There are suggestions out there you can use for your design.
Also the Logo of the Theater is BIG. it dosnt need that much space. Its not the most important object, still you choose to make it bigger than other parts on the Picture
I would recommand to google for posters though, mostly they choose to go big with the font or big with the visual element.
You Choose how much time you will put in for free, but now it's gonna represent you out in the wild, so i would choose to shine like @NessIllustration said.

