I would like to learn how to draw.
Sure! Drawing is a form of visual art in which a person uses various drawing instruments
I wonder if been a good drawer made you a good painter too.
I remember a secondary subject on technical drawing ,we used the .Technical drawing tools include and are not limited to: pens, rulers, compasses, protractors 
Good to know,  Do you know any good books about drawer>
Well you can find them in book stores but I could also suggest a  freehand drawing, usually not intended as a finished work.
But I am very bad at drawing at this point,  what else should I know about drawing?
Drawing
Drawing is a form of visual art in which a person uses various drawing instruments to mark paper or another two-dimensional medium. Instruments include graphite pencils, pen and ink, various kinds of paints, inked brushes, colored pencils, crayons, charcoal, chalk, pastels, various kinds of erasers, markers, styluses, and various metals (such as silverpoint). Digital drawing is the act of using a computer to draw. Common methods of digital drawing include a stylus or finger on a touchscreen device,
Rosa's comics.
Work Drawing style.
With a bachelor of arts degree in civil engineering as his only real drawing education, Rosa has some unusual drawing methods, as he writes: ""I suspect nothing I do is done the way anyone else does it.""
Because of being self-taught in making comics, Rosa relies mostly on the skills he learned in engineering school, which means using technical pens and templates extensively. He applies templates and other engineering tools to draw what other artists draw freehand