As long as your idea can be realized and turned into a product, you can apply. But I mean the utility model. Because the utility model has not been examined. If you want to apply for an invention patent, you must meet three characteristics, namely novelty, creativity and practicality. Invention patents are subject to substantive examination. So to make sure that your idea has come to mind, you need to go to the intellectual property online for patent search.
I suggest you find a formal intermediary to help you apply. If you write it yourself, it is difficult to pass the invention patent, and the grasp of the scope of re-protection is also very problematic. If the claim is not well written, it will be quite troublesome if there is a lawsuit in the future. At present, there are many subsidies for patent applications in the country, so there is no need to save these money.