I'm a Graphic Design graduate, currently studying my master's degree.
Esthetically, I can't say that it looks bad but what this poster is missing is "an idea". There's no idea in the base of this poster. This is such a cliche visual that has been used millions of times. It's pointless and it has nothing to do with the topic you have there. Don't ever forget this: "GRAPHIC DESIGN IS IDEA. WITHOUT IDEA AND CREATIVITY, THERE'S NO GRAPHIC DESIGN."
Visually speaking, you've wasted the half(upper) part of the poster with the blue stripes that are not interesting at all. And you squeezed all the typography to the lower part. If there was an interesting illustration on upper part I would understand but with this way it makes no sense and it's not looking so good.
Also there's no kerning in the Typography.
It might seem harsh at first but you gotta take it if you want to improve yourself. If you want to be a Graphic Designer, you must go to school. Graphic Design is a division of Fine Arts. There's no way to learn Graphic Design without learning art in an academic degree.
Good luck!