Hey @aftersun 
Welcome to TR!
Unless you have an event planned that you’ll be completing, then the Increasing FTP plan is the right plan to increase your FTP.
@Pbase did a great job explaining that when you first get started with TR, the first few workouts may seem/feel easy, and this is intentional. This way, the system can calibrate where you need to be in intensity level. As you can see, your next VO2 Max workout has a level of 3.4. As you keep completing the workouts, they will become even more fine-tuned to you!
Here is also a great article a colleague of ours just posted not that long ago, which I think you’ll find very helpful: How TrainerRoad Builds Adaptive Training Plans for You
Lastly, I just wanted to mention that at TR, we are firm believers that power is the ultimate training measure 
as it does not vary by external factors like HR does. So while HR can be a useful metric for training, your TR workouts will be power-based.
More info here: Power vs. Heart Rate