There are many areas in photography where you can do some experiment. Experiment with lights, with shutter speed, with aperture and many more. Equipments that required A camera with external flash. A black or white background. A timer connected to camera and a tripod!!!
First you need to make sure that the room is dark. Unless your room is dark, you can't capture smoke abstract photographs. You can use anything like a stick, or some thin ropes etc etc to get smoke. you need to keep moving the stick to get the different designs of smoke. Background should be black. You can change it to white later in PS if you want. You can put different color as well. Using the timer, just click.
To capture a Bokeh, you need to switch you lens to manual focus and then you just need to make it out of focus. Capture that you like and also adjust the distance.
Keep experimenting. Good luck all