There are tutorials on this techniques blog. I also have several tutorials on YouTube at MarcyFine Art.
If you simply google YouTube MarcyFineArt, or paste this link in your browser,
you will come up with my channel.
Some of these are on Basic Drawing, others are specifically about using markers or using markers with mixed media, pen and pencil.
My reason for including both sets of topics is that, as an artist, I feel the grasp of values, even more than the grasp of drawing or painting skills is an essential tool for making a strong work.
Values are the darks and lights. LIke in life, they move your eye from one place to the next. Although we "see" things in color, the patterns we see with our eyes is guided primarily by the light and dark areas, how light falls on objects.
To grasp this, simply squint. You will be leaving out details and color information and " see" dark and light shapes.
For a strong composition, these patterns assist in every work of art.
So head on over to YouTube to view how I use these principles.
https://www.youtube.com/channel/UCRPWZ0gafpY8yu5e6qc-Nuw ) or click MarcyFineArtYouTube
You Tube Tutorials On Mixing Colored Pencil and Markers
For basic drawing skill, we draw a pet. Here's my cat Buster.
So I hope you take the time to jump over to YouTube and take a look!