I am no expert and I didn't shoot much with it yet too.

The Poppy was shot with my brother's lens. It is the master of bokeh and is more expensive too.

Try with different light, especially on the background. Dappled sunlight though the trees or grasses can work really well. I noticed that the distance between the object and the background is really important too.
Most of all have fun and experiment :) You will like it!