If you mean: Making it visible to the public.

https://mecabricks.com/en/account/library (or click your username in the black topbar)
Double-click the creation in the list
Check the mark next to "Open to public"

I want to know how to make your model show as a Lego set and be visible on Brickset? How would I do that?

@Mr.quick You can read some info about that here:
https://mecabricks.com/en/forum/topic/353