Personally I am useless when it comes to tieing knots. My knots just come apart and I lose things. I really should be good at it because I took sailing lessons years ago and that was part of the course but I can't remember a thing about the knots.
I did happen to find a site that claims to show you how to tie "the 10 most useful knots". It does have pictures and comments so I think with some determination a person could follow it. Here's the link