Where do I go from here?

So I have been mapping, and getting used to Hammer for 5-6 months. I have a pretty good understanding of how it works, tools, textures, etc.
But I’m Not really too sure where to go from here. What should I do? I can bake maps, but I can never really come up with creative, original ideas for maps, whenever I take ideas and inspiration from another map, it pretty much just ends up just like that map.

You have to be creative as a mapper. Design levels on paper, then make them. Try different architectural styles. Dick around with entities and see what cool things you can make. Try stuff. And taking inspiration from other maps isn’t a problem, but try adding your own twist to the map.

Search Internet for inspirations
https://www.flickr.com/photos/robink93/sets/72157644263018971/ )

Recrate a real location and then try to fill it with gameplay: enemies, puzzles, physics mechanisms (all you have learned).