Huge gaps between post excerpts and looks messy.

I’m using the Evolve theme. There is a post size gap underneath some of my post excerpts, but others are fine. it looks all over the place, is there a way to make all of them the same siz?e and set out evenly? here is a link so you now what I mean https://www.truthshallsetfree.com/discussion/ Thankyou in advance to anyone that can help this is painful lol
BTW i am totally new to web design and haven’t really learned any code