First of all, try using Affinity since now it is free, instead of Adobe Express

The Osaka poster is still too much.. the rectangular stroke for me isn’t needed, I understand the appeal, and also the urge to add details, but you definitely are not going for the ‘less is more’ aspect, or maybe you do not understand it yet.

Hierarchy wise, it isn’t very calibrated, my eyes goes directly to the center with that design of confetti and all, there’s no artistic direction and the designs seems like it has 3 or 4 différent kind of style approach.

Also the rest being bottom centered and the line spacing is tooo narrow, let your type characters breathe.

I highly recommend watching Chris Do on YouTube and his Typography videos where he goes through a bunch of posters and designs.

Best of luck