You can definitely knit pants, but you will need to learn how to knit, in general first.
I read a novel that was all about people knitting (I don’t knit, but am interested in most needle crafts like crochet, quilting, needlepoint, lacemaking etc) In the novel, I came to understand that when knitting dresses or pants, in which you would not want to be able to see through the garment, much thinner knitting needles are used, for much smaller and tighter knots.
Here is a book on Amazon for beginning, left handed knitting:
https://www.amazon.com/Beginning-Knitting-for-Left-Handed-Knitters/dp/B0011TN7AY
Here is a site that might help you find what you are looking for: https://www.knittingparadise.com/t-191928-1.html