I appreciate your help and concern.
I reached on the 5th step.
The reason is that I would like to learn how to work KNIME Analytics Platform and also interested in GUI based data science.
I have done in 4 step which import org.knime.core.
I got error when I launch KNIME after importing org.knime.core.
Below image shows before launching KNIME and errors.
And also I attached log file after run.
error log.txt (8.6 KB)