Any time that you're working in Premiere Pro, just click the "Learn" button from the Home Screen or use the "Learn" workspace.
Or, use this link:
https://helpx.adobe.com/premiere-pro/tutorials.html
Lynda.com is now LinkedInLearning.com. It's subscription based, but there is a good chance that your local library provides full access. For example, I can access it in Los Angeles by going to the lapl.org web site, clicking the e-media llink and then clicking the Lynda.com link. From there, my Los Angeles Public Library card number gets me full access.
For self-guided learning, the Adobe Premiere Pro Classroom in a Book is also pretty good:
Adobe Premiere Pro Classroom in a Book (2020 release) 1st Edition by Maxim Jago (Author)
https://www.amazon.com/Adobe-Premiere-Classroom-Book-release/dp/0136602207?SubscriptionId=AKIAILSHYYTFIVPWUY6Q&tag=duckduckgo-osx-20&linkCode=xm2&camp=2025&creative=165953&creativeASIN=0136602207