Can anyone give me information on learning sign language?

I’m looking for some websites or books that people have had positive results with in learning sign language. I took some classes when I was younger and still remember most of it, but I would like to learn more. Money is tight, so I’m hoping to find some free resources if possible. .

does anyone have any suggestions for books for a left-handed person trying to learn american sign language?

i’m probably the most left-handed person in the world. all the books i have seen on ASL are diagrammed for right-handed people, but i find them confusing. .