Drawing, as in accurately reproducing a 3D scene in 2D by hand, is a nice skill to have, but it's not essential to 3D modeling. There are many ways to produce a model; you can scan something and import it, you can download something and modify it, or start with 3D solid "primitives" and combine them, make profiles and loft them, construct a network of curves and skin it, etc. And if you make a mistake, there's always control-Z.

You might have better luck, though, if you started with something else besides Blender. That program is well-known for its horrible interface (I know, some people love it - not me). Try different free programs to start with, until you find something that seems intuitive to you. Tinkercad, sketchup, Fusion360 - there are starting to be a lot of them to choose from. Of course, if you get into it, paying for a program that makes you more productive makes a lot of sense - with all the time you'll put into it, it works out to pennies an hour...