Recently bought my first home (!!!) and I have a big blank wall in my dining room that is perfect for a gallery wall. But I really love the gallery walls that look unplanned (but where I'm sure a lot of planning actually was involved...)

Can anyone share tips or tricks or even inspo from gallery walls in their house? I don't want it to look too matchy but also don't want it to look really random. I shared some examples of photos I like...