Sadly, good ideas along are a dime a dozen, as professional inventors will tell you, making it a reality can be a long journey. You first step may be doing a patent search to see if anyone has already thought it up, in this digital age it's a lot easier to do a preliminary search, though a complete search might require the assistance of professionals. Take care, thre are many predatory invention assistance companies that promise everyone they have the next million dollar product.
Along the line of Dime a dozen Ideals, here are some other references on that thought. the first one provides a decent check list.