Strategies and Skills
There are two different ways you can overcome a weaker drawing ability. The first is to use strategies that help you get around the need to draw. Sketchnotes aren't just drawings after all.
The second is to work on a few basic principles and skills that will help you draw better.
The next two sections look at each of these options on their own. I've started with the strategies as these can give you instant benefits and are useful even if you can draw well. You can, however, skip to the skills section if you prefer.