STEP - I - Install anaconda with python 3.4 or later (https://www.anaconda.com/products/individual)
STEP - II - Create conda environment for opencv projects . (https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html)
STEP - III - Install anaconda's opencv package onto the created environment.(https://anaconda.org/conda-forge/opencv)
STEP - IV - Validate opencv by importing cv2 in python. Successfull import confirms opencv is ready to use.
Try out the provided python programs as a warm-up. Good luck!!!