Recommended and mentioned products
Gutenberg Books is free to use Android, and iOS app with more than 50,000 titles from classic to top hits and features all the important books ever published in history.
This is a video training app for businesses and individuals who need to offer details to others who might not be able to be at the same location.
I second looking for any instruction you can get from David Blatner. He's been the GOAT in this field for at least 30 years. Back in the '90s, his QuarkXpress Book—a door stopper if there ever was one—is still the only computer software book I've read cover to cover. He's thorough AND entertaining. See if your local library offers free access to LinkedIn Learning (RIP, lynda.com *sad emoji*) and devour everything.