I copied my reply on another topic (analog vs digital) because it’s also relevant for you.
to set the context:
23 years independent industrial designer (>100 clients), part-time teacher at UGent university in industrial design and design communication.
sketching and rendering: 80% digital 20% analog
personal doodling is often done on a scrap piece of paper using the nearest ballpoint I can find. Although I’m picky on the flow of the ink (more expensive doesn’t mean better here).
Client projects almost always start of digital right away. For that I use mobile and desktop solutions.
Mobile: Ipad pro + pencil + concepts and procreate and sometimes sketchbook pro when I need guides like symmetry. Macbook Pro with wacom intuous medium on mischief, Ps, Sketchbook Pro
Desktop: Macbook pro with wacom cintiq 27"
I never scan analog sketches anymore to enhance them digitally. Only to archive them. I graduated in 92’ (yes) in a period when digital sketching was practically non existing. I mastered the art of using markers but since I discovered wacom in 1999 I hardly touched a marker since.
A big issue for me is my workflow. Sitting in a meeting sketching on the Ipad pro, sharing that screen to a bigger screen really facilitates the decision process. If there is a physical sample or mock-up on the table it’s so easy to take a picture from one of the drawing apps and draw over a dimmed layer. Or if a 3D model exists of the basic shape or components that need to be integrated I load that model into a 3D viewer, take a screenshot and use that as layer. It’s all about efficiency and powerful communication. As the designer at the table it’s your job to make sure everybody understands.
To do that on the spot in a qualitative way you need self-confidence. That comes from skill. To get there you need to practise (a lot).
I my ID classes the students that excel are the ones that sketch all the time. To master a tool you need to spend time on it. What’s very important as a designer or creative, is that the tool doesn’t slow down the flow. If I need to explore loads of options in a design (technical or styling) I always use a tool with an infinite canvas like concepts on ipad or mischief on desktop. It allows you to continue working in all directions without the need to create a new document for every idea. You also keep track of your thinking process. That’s also a good communication tool.
I don’t care what tool is being used by others. The efficiency and result are more important. As an ID you need to find a good balance between efficiency, communication value and artistic value. The last one should be ok and nice to look at because it can evoke emotions, but not at a cost. For instance using a strong perspective can be very dynamic and can look sporty and aggressive, but if only a really trained eye of a designer can imagine how the product really looks like, you’re off limits.
to end a note on the correctness of the visuals. Train yourself and be very critical on proportions and perspective. I often see presentations with several sketches of the same concept on one page actually showing different products. If you draw multiple viewing angles of one product it should really keep the same proportions.
success and have fun!