Does this setup work? Any suggestions?

[u/TemporaryGoose8570]

I’m still a beginner and I’m about to set up my first freshwater aquarium. It’s a 6.8-gallon tank (about 26 liters).

I’d love some suggestions on how I should arrange the substrate and rocks.

I’m using a fertile substrate (I have more on the way, so I’ll have 2 kg in total) and inert substrate (basalt and river gravel).

I’d also really appreciate some advice on how to secure the huge rock on the right side so it doesn’t fall over in the aquarium.

If you have any other suggestions on what I could improve, I’d be very grateful!

Tank is 40x29x23