Excellent example of a creative effort that even includes the physical satisfaction of building a physical object! Sometimes that makes it way more fun (motivating), and actually probably helps you learn and understand whatever you're doing more completely by involving another sense.

I think in general, there are too few people putting in the deep time that prepares them to be an engineer in their near future. You're practically there already: it will feel the same after perhaps you decide to call yourself a degreed "engineer" but you will have more mental tools, broader knowledge, confidence from having been able to make what you envision, understanding across disciplines. You have a lot to look forward to! As I told my kids: don't let imposter syndrome take hold of you for a moment! You are a rarity in any group.