If you suspend your account, we'll keep your account data. When you resume, you'd just start up a new subscription at the current rate and new rides and data will be added to your existing career.
Nate and I co-founded TrainerRoad.com to be a simple, straightforward way to train on a bike so I'm glad to hear it is working that way for you.
We don't support adding your own workouts yet. You can suggest workouts here, though, until we add that. Lots of people use the free rides or just have their coach pick from one of the 130+ workouts to do right now.
For the time being we recommend recording on a separate device like a Garmin if you want to upload it to other sites or services but we plan to have a way to get ride data out of TrainerRoad soon. It will probably be in .tcx format first.
I'll be happy to answer any other questions.
Reid