Hi, I'm planning to make a webshop on my domain https://meditatieinstituut.nl for my courses. 
I would like to work with subcategories and have the url-structure working with subfolders.

So for example I would like to have the category

Meditation Courses > Vipassana meditation Courses

Meditation Courses > Metta meditation Courses

Other Coursus > Stress reduction courses

Other Courses > Frustration reduction courses

etc.

And the directories should be like:

https://meditatieinstituut.nl/meditation-courses/vipassana-meditation-courses

But my programmer tells me this is not possible. It can only be done like:

https://meditatieinstituut.nl/meditation-courses-vipassana-meditation-courses

But this is not good for SEO purpose.

So I'm experienced SEO specialist and not a programmer. So I would like to double check in this community.

Is there really no way to work with subdirectories for subcategorie pages?

Looking forward to your thoughts.

Thanks!