Great ideas! How to make em come real! Copyright and more!

I would love to get some info and advice in general about product ideas,
how to take it from idea to a real product without loosing all the credits.
Imagine you have come up with the most brilliant idea of a new product but
you dont have the resources to produce it yourself, should you make some
fancy concept sketches and send it to companies that produce similar products
(and find great interest in this product) or should you try to get a patent as
soon as possible or…

…theres probably no waterproof solution but any kind of advice would be
highly appreciated for an amateur :slight_smile: