Can I set up a series of actions to occur with one tap of a tag? <-- See The app in Google Play called "Tasker". I'd recommend having one action on each side of the ring.
Will NFC Ring Control recognize and launch any app installed on my device? <-- Depends on the app and what intents it supports. You can use ANY NFC software with our rings, you aren't just limited to ours.
2.1 Or, can I use the writer and ring to accomplish this? See 1.
By the way, these are actions I'll use at the bedside in the morning and night so I’m looking for the best solutions.
Last, I still need to purchase some NFC tags and the best ring. Are there any guidelines or requirements? <-- Just look at the datasheets for each ring to see which suits you best. I'd recommend the 2016 rings for new users and 2013 for more experienced :)
Many thanks for your response. I'll get to work on this and make a decision.