thanks for your question, the first thing before diving into physical product development is to make sure that your idea's core value is actually unique and there isn't already an existing product that can serve a similar purpose already in the marketplace. I say this because I have over 12 years of experience designing physical products for scale, however I still look to alibaba and existing OEM suppliers (original equipment suppliers) to see if a similar product exists so I can use or modify that to get to market quicker. This is a case of being really analytical about your product idea, is it really unique and actually doesn't exist in any form? If so then it's a good idea to go through the different elements that would make or break the idea like size of market, expected cost of the product (or cogs), expected time to market or development time etc. It's a big challenge creating a physical product but something that's really rewarding when you nail it. Hope that helps, Alex