I see you have some questions regarding routines. Although you have already found your solution, for the benefit of others that may also be wondering:
You can, indeed, set a routine to a specific time. When you open your Alexa app on your mobile device, and select Main Menu > Routines > Add a new Routine (the + symbol in the top right), you will select When this Happens > Schedule > At Time. This will allow you to designate a specific time for your schedule to start, and allow you to choose how often it repeats (weekly, daily, etc.).