I have come across A LOT of books in my day about how to draw comics or become a cartoonist. But definitely one of the best, more direct and simplest methods I have found is by cartoonist and teacher Ivan Brunetti. It is both a How To book and an introduction to understanding comics and cartooning. You can see more about it in the attached video, featuring Brunetti himself. I highly recommend this book if you want to get into making your own comics at whatever level.
Learn Cartooning with Ivan Brunetti