Linking Google Drive to Speechify makes it easy to breeze through documents and PDFs.
Open the Speechify app
Click '+" Add at the bottom of the screen
Under the Import PDFs and more section, tap "Google Drive"
Select "Continue" on the pop-up
Select the Google account you want to use
Add your desired file and the app will read it for you
The next time you select "import documents" it will automatically show your connection to Google Drive