I'm having a lot of fun with this, having just completed addition. I suppose it's natural [pun not intended] to feel like you don't really know what you're doi

I'm having a lot of fun with this, having just completed addition. I suppose it's natural [pun not intended] to feel like you don't really know what you're doing except symbolic expansion / replacement until you better grok the process, but perhaps that's part of the gamified fun.