Welcome 
Main forum intro.
Here is the TR app Help center for tons of good stuff.
Overall, now that you have tested, you should pick a training plan, add it to the calendar and get to business.
You can ask questions if you need to know where to start. The search tool in the forum is awesome and you can find many topics already covered in great detail.
Ask away of you don’t find what you need and we will direct to existing info or answer to get what you want.