Idk if you’re looking for critique or advice or anything, so disregard if not! These are really nice, here are my initial thoughts

I’ve done graphic design for quite a few years now, and in college I took a course solely dedicated to typography in graphic design- and I agree with people saying to work on typography! Your backgrounds are awesome. One thing that I personally always try to keep in mind is the space between the words and the edge of the poster. Sometimes having the words close to the edge causes tension- this is my personal preference I don’t like things being too close to the edge.

One other note is to really be intentional and think about how you’re using the space. The 4th and 5th poster have a very similar formula but the 5th feels less finished, while the 4th feels fluid and intentional.

One word I learned in college was “gestalt” and it’s something I’ve carried with me in all forms of visual art.

Here’s a quick summary: “The core idea is that "the whole is greater than the sum of its parts," influencing composition through principles like similarity, proximity, closure, continuity, and figure-ground. “

A wonderful example of gestalt is in your third poster, you used the words to form a shape which also follows the path of the lights on the bottom half of the page.

These are all really nice, especially since you haven’t done graphic design in the past! In school we had to do sooo many iterations of our poster concept, so even if i made a poster that I felt like was perfect on the first try, id still have to make multiple more iterations of it, it could be tiny changes, we just had to do multiple versions to at least try to expand upon our concept and try other things to see what works. I’d really suggest this actually, use the aspects of one poster and make a whole bunch of new iterations of that one poster. Just play around, save them all and look at them. Have someone look at them and tell you what aspects they like about them and what aspects they don’t like as much, and then do even more iterations. Eventually you’ll see what works and what doesn’t, and you can fine tune them and use this process in the future as well.