I always urge my students to learn from the experts, the people in the know!
And here are two opportunities for you. Both are highly reputable organisations, which I trust.
You have to sign up, but it's totally FREE!
Good luck :)
IELTS Academic Reading
Pay attention to the IELTS website for how your score is calculated. I've copied a little of the information here, or you can click on the link above.