Ikebana lesson

I took a Ikebana lesson today.
I tried a free style arrangement.
Flower materials are
Leucadendron,Campanula,Allium,Silene-Sakurakomachi,Gold sticks,Baptisia australis.

Next picture is my senior colleague's work. This style is called "Rikka"which needs high level skills.

I want to try like this soon !