Hi Isabel,
welcome in McNeel forum.
Please, read this post: How to ask effective questions
(… point 7 mainly)
I think there are similar posts in the forum, have you searched for them?
What you tried so far? Have you achieved something?
Is that a repetitive module/element? A 3d voronoi?
Maybe it would be useful to thicken the single module; an offset inside every bubble/cavity, and then shaping your structure.
(Now there are a lot of small surfaces/holes/edges that make hard to work on it, or even the circular trimming)
This is just an idea.