Although I’m following most ux principles I read, my scene doesn’t look engaging enough [on hold]

I've read some articles about UX and I'm using all of the principles I read in my app, but it just doesn't look right and I was looking for some of you guys' opinions.

Here is how it looks

The app would be like a place where people post any kind of ads, swiping if interested or not. Thing is, maybe the fact that I'm showing them all in an endless scrolling fashion or whatever it is makes it look in my opinion not that good, and to be honest maybe a little boring to keep scrolling, perhaps a little more diversity in the cards would make it look more fun.

I would love any kind of tip, thanks!