First off, get a good quality digital pen and tablet. Then, practice a lot! Look at tutorials online to learn about shading, line art, and coloring techniques. Pay attention to details and keep refining your work.
Start with a graphics tablet and software like Adobe Photoshop or Clip Studio Paint. Learn basic sketching skills and build up from there.
Well, to draw manga digitally, you need to get familiar with the tools of your chosen software. Understand layers, brushes, and pen pressure. Also, study anatomy and poses to make your characters look realistic and dynamic.