How to ride one of the community workouts in the free version?

[Alex]

Sadly Garmin does not allow this any more for new companies. You can download and upload a file but not automatically. Only Zwift and TrainerRoad support that as far as I am aware. You can see discussion here.

Official word from Garmin on activities

does this change things regarding uploading activities to Garmin Connect? ON VELO NEWS: Garmin allows other apps to update Training Status Garmin Connect now accepts direct data uploads from third-party apps, including Zwift, and will update your Training Status accordingly. Garmin’s Training Status is an overview of your training habits over time, and is a metric that attempts to quantify how your training is progressing. The data pulled into your account will now automatically count toward…