Possibly not that difficult. But again, the saying goes “it depends”.
If you have bunch of workouts, you can just load them into intervals and put them such that you can create a training (load) ramp for a week to week basis.
(I screenshot-ted this from somewhere in this forum, it’s also somewhat written in TR’s website)
I have no idea how / what format is TP’s workout library in. (zwo? MRC? ERG?) I think it’s best if you are able to get clarification and whether you can download the entire library. (if you have a TP account, and will be using that then it possibly makes no difference except that you will need to figure out how to execute those workouts either indoors on trainer or outdoors)
PS: If you’re looking for an indoor training app, you can check this out BreakAway: Indoor Training App Now with Intervals.icu Calendar integration (Workout Of The Day)
disclaimer: That’s my app