Nano 20L: Rock hardscape - First steps

[lucasmamoru]

Hey, guys from TPT Forum!

This is my first post here and English is not my first language, so I'm already asking for sorry if I do something wrong here.

Now, let's go.

I am setting up a new aquarium. It has 20 liters (aprox. 7 gallons) and I'm thinking about trying some iwagumi stuff. I have zero experience with it, but I've been playing with the rocks and substrate and the results are below.

So, what do you guys think? What can be changed there to get better?

All tips and criticism are welcome! Thank you guys!