I'm wanting to know the process of an invention

I have an idea no money
Willing to do the 9 yards 10 if need be
What next prototype?paitient?which order
How do you find out if someone has come up with the idea where do you look
I

I found two "for Dummies" books helpful:
Inventing for Dummies and Patents, Copyrights & Trademarks for Dummies.

Be sure you are keeping a "diary" of every activity, thought and action that relates to your idea. Date each entry and keep it going. Include even this post.

Also, do some surfing for an Inventors association in your area.

Of course don't fall for any of the places that advertise on TV...