Welcome to the Math Help forums. We are glad you joined us.
I am curious: what is your background? Are you a high-school student? A university student? What made you decide to learn calculus from a textbook? Are you preparing for an upcoming course?
Learning from a textbook is possible, but it goes a lot easier when you have a support group around you (i.e. - a teacher and classmates).
Hope it works out for you.
See you around the forums.