How would i set this hierarchy up

Hi, im not great at coding, and i have metabox AIO so can use all the visual stuff. i would like to set up pages/posts and wondering if i can do this via metabox or should i use wordpress pages and posts.

the plan is that all of these would be /expertise/slug of the post im showing. im just not sure

1. how to set up custom post types (so there are parents - org psychology and coaching), then sub parent (psychometric, expertise) and then the post.

each item above will have content

Thanks for giving me some pointers

https://imgur.com/a/CYOUsCK

if image doesnt appear

2 parents

1 - psychology - 2 children - psychometric - goes to 3 children
executive - goes to 3 other children
2 - coaching - 1 child