First time setting up an aquarium and thus, first time trying to aquascape. Pick up various rocks from a local landscaping company; some lava rock, elephant skin stone, and something that looks like ohko/dragon stone. I've set up a couple test scapes and can't quite decide on the best. I can always throw more substrate in, everything is temporary for now. Note that this is a 5.5 gallon aquarium and I'm going for an iwagumi-esque scape, if possible.
I think I like the lava rock scapes the most. Not sure about the rock in the right of the first picture. The second picture is basically all the lava rocks I have (though I have another largish one not shown). Third image is the elephant skin stone, just one large rock. I only have it and another piece the same size, so not much variation there. Last is the ohko front facing and top down to show rock sizes/positioning... having trouble coming up with something I like for it so just threw it together.
So, any help here would be appreciated.