A $150-200 minimum order sounds like a solid starting point, and you can always adjust later based on demand. I was honestly a bit surprised at first that there was no minimum at all. The time and risk involved in shipping very small orders usually just isn’t worth it.
If you decide to keep free shipping for orders over $200, that would be a nice touch, but of course that’s up to you. A $15 shipping fee isn’t really a big deal either.
Overall, it’s good to see your evolution. You’re clearly moving away from the early “for myself and the bros” mindset and starting to think more like a businessman. It’s been interesting to watch that transition.