Do textbooks teach you enough without having to learn from teachers?

I’m attempting to teach (or homeschool) myself to try to catch up on alot of education I missed. but the problem is I can’t go back to school cause I’m 20 and can only take GED classes which I don’t have the time or money for now (and I’m kind of embarrased), so I have to try to catch myself up, at least a little. Most of you guys probably went to high school, so could you tell me if textbooks would be enough to learn most things they teach you? Is the teacher or textbook more important? And does anyone have any book suggestions? Thanks