> I would go on those sites, read blogs/posts/product pages over and over, and get overwhelmed and just shut down based on the number of options.

Welcome to engineering. Pick one and finish the project. Then look back.

Yes, running an RPi Zero to watch a button press is overkill. So what? It optimizes delivery time over efficiency. You can optimize for cost or power later if you feel like it.

Anyhow, nice job.