I second this.
YouTube has so many great video tutorials on editing. That’s where I learned after effects! In addition to being totally free, they’re also more useful than an ebook format because you literally get to watch someone do what you’re trying to learn. You can pause and try yourself, then go back and forth as needed.
Also, have you heard of skillshare before? I work in digital marketing and recommend it all the time!! Basically it’s like Netflix for on demand video lessons on photography, editing, Instagram, wordpress, SEO, etc. When you sign up, you get two months free - which is quite generous. They definitely have classes on all the adobe creative suite products, including Lightroom.