If your current plan is working well, and Rails is making sense to you, then fantastic. I often encourage front-end devs getting into back-end Ruby to first go through Sinatra. Building a very simple tool (shopping list, address book, etc.) in Sinatra and then replicating it in Rails will give you a good sense of how they're alike and how they're different. And because Sinatra is so much less "black box-y", you'll have a better sense of how the code is working.