The goal is to find the base current, collector-emitter voltage- and the base-emitter voltage for each of the values.. My problem is, how am I gonna adjust the potentiometer into 0.2 , 0.4 up to 2.0 for me to get the required parameters .. I provided an image for a better view.
What's the problem?
You turn the potentiometer while observing the collector current until the current equals the defined values 0.2, 0.4, 0.6...
You'll find that as you turn the potentiometer one way the current increases and goes down when you turn it the other, so just get the desired current then don't touch it while you make the voltage measurement. Then do the next setting/
When you have adjusted the collector current to each of those values you measure Vbe and Vce with a volt meter.